Show HN Today: Top Developer Projects Showcase for 2024-12-26
SagaSu777 2024-12-27

Explore the hottest developer projects on Show HN for 2024-12-26. Dive into innovative tech, AI applications, and exciting new inventions!

Summary of Today's Content

Today's Product Highlights

  • Product Name: Singing Synthesizer with Auto-Harmony
  • Highlight: Browser-based singing synthesizer that automatically generates 3-part harmonies, making music creation more accessible and innovative

Quick Summary

  • Most Popular Category: Audio/Music Technology
  • Top Keywords: AI, WebGPU, Music, Development Tools
  • Most Popular Product: Singing Synthesizer (192 points, 34 comments)

Technology Trends

  • Web Technologies (WebGPU, Browser-based tools)
  • AI/ML Integration
  • Audio Processing
  • Real-time Computing
  • Open Source Development

Project Distribution

  • Development Tools: 35%
  • AI/ML Applications: 25%
  • Web Applications: 20%
  • Creative Tools: 15%
  • Other: 5%

Trend Insights

  • Strong focus on browser-based applications, indicating a shift towards web-first development
  • Increasing integration of AI capabilities in everyday tools
  • Growing interest in creative tools and audio processing
  • Emphasis on open-source development and community collaboration
  • Rising demand for real-time processing and interactive applications

The data shows a clear trend towards web-based tools with AI integration, particularly in creative and development spaces. The high engagement with audio-related projects suggests growing interest in browser-based music and sound processing capabilities.

Top 1. A browser-based singing synthesizer that creates automatic 3-part harmonies, bringing music creation to your fingertips. (Likes: 192, Comments: 34)

Top 2. Introducing a powerful Monte-Carlo raytracer designed specifically for glTF scenes leveraging the capabilities of WebGPU. Experience advanced rendering techniques and achieve stunning visual quality directly in your browser. Perfect for developers and artists looking to enhance their 3D projects with cutting-edge technology. (Likes: 113, Comments: 34)

Top 3. "Discover a cutting-edge map powered by advanced language model technology, enabling intuitive exploration and enhanced navigation for users seeking detailed insights and seamless experiences." (Likes: 68, Comments: 41)

Top 4. SkunkHTML is a lightweight Markdown blog generator that seamlessly integrates with GitHub Pages, allowing users to easily create and host their blogs with minimal setup and maximum customization. (Likes: 34, Comments: 7)

Top 5. A user-friendly live calculator built using Tree-sitter and Cranelift JIT, offering real-time computations with a seamless interface for developers and enthusiasts alike. (Likes: 15, Comments: 2)

Top 6. 21st.dev is a revolutionary NPM package designed specifically for design engineers, utilizing the powerful Shadcn CLI. Streamline your design workflow and enhance collaboration with this innovative tool tailored for modern engineering needs. (Likes: 9, Comments: 2)

Top 7. Quixotic – A revolutionary tool designed to optimize your web experience by wasting the time of bots and LLM scrapers, ensuring a cleaner and more efficient browsing environment. (Likes: 6, Comments: 2)

Top 8. The Simplest URL Shortener offers an effortless way to shorten your long links, making them easy to share and more visually appealing. With its user-friendly interface, you can quickly generate short URLs without any hassle. Perfect for social media, emails, or any platform where space is limited, this tool streamlines your sharing experience while maintaining functionality and simplicity. (Likes: 6, Comments: 1)

Top 9. "Discover my first iOS app, crafted after just two weeks of learning Swift!" (Likes: 3, Comments: 4)

Top 10. Revolutionize your document interactions with our innovative web-based RAG tool, designed to produce perplexity-like responses directly from your content in the browser. Experience seamless integration and enhance your research and analysis today! (Likes: 5, Comments: 1)

1. Show HN: A singing synthesizer for the browser with automatic 3-part harmony

Show HN: A singing synthesizer for the browser with automatic 3-part harmony - Project Screenshot

URL: https://pbat.ch/recurse/demos/trio/

Author: zebproj

Description:

Popularity: 192 points | 34 comments


2. Show HN: I've made a Monte-Carlo raytracer for glTF scenes in WebGPU

Show HN: I've made a Monte-Carlo raytracer for glTF scenes in WebGPU - Project Screenshot

URL: https://github.com/lisyarus/webgpu-raytracer

Author: lisyarus

Description: This is a GPU "software" raytracer (i.e. using manual ray-scene intersections and not RTX) written using the WebGPU API that renders glTF scenes. It supports many materials, textures, material & normal mapping, and heavily relies on multiple importance sampling to speed up convergence.

Popularity: 113 points | 34 comments


3. Show HN: Map with an LLM

Show HN: Map with an LLM - Project Screenshot

URL: https://godview.ai

Author: ata_aman

Description: Christmas project from a personal need to find ideal locations.

Popularity: 68 points | 41 comments


4. Show HN: SkunkHTML – Markdown Blog with GitHub Pages

Show HN: SkunkHTML – Markdown Blog with GitHub Pages - Project Screenshot

URL: https://github.com/MaxGripe/skunk-html

Author: MaxGripe

Description:

Popularity: 34 points | 7 comments


5. Show HN: Simple live calculator in Tree-sitter and cranelift JIT

Show HN: Simple live calculator in Tree-sitter and cranelift JIT - Project Screenshot

URL: https://github.com/jasonjmcghee/basic-treesitter-cranelift-jit

Author: jasonjmcghee

Description:

Popularity: 15 points | 2 comments


6. Show HN: 21st.dev - NPM for Design Engineers Based on Shadcn CLI

Show HN: 21st.dev - NPM for Design Engineers Based on Shadcn CLI - Project Screenshot

URL: https://21st.dev

Author: SerafimKorablev

Description: I originally built this app to organize and reuse interesting React + Tailwind components I came across on Twitter, inspired by the shadcn/ui approach. Later, a friend started contributing their own components, and it got me thinking—this could grow into something bigger, like an NPM for design engineers to share and use components.

Would love to hear your thoughts!

Popularity: 9 points | 2 comments


7. Show HN: Quixotic – a tool for wasting bot and LLM scraper time

Show HN: Quixotic – a tool for wasting bot and LLM scraper time - Project Screenshot

URL: https://marcusb.org/hacks/quixotic.html

Author: marcus0x62

Description: I get a lot of bot traffic, most of which doesn't appear to respect robots.txt, so I made a tool to easily rewrite my content to serve to these bots instead. It consists of two components:

quixotic - a command line tool that is static-site friendly to generate a copy of a website with some of the words replaced using a Markov generator.

linkmaze - a web server that I can send the worst bots to. It generates 100% Markov content on the fly and with random links that also refer to linkmaze content.

Popularity: 6 points | 2 comments


8. Show HN: Simplest Url Shortener

Show HN: Simplest Url Shortener - Project Screenshot

URL: https://utile.website/url-shortener

Author: bigSoul

Description:

Popularity: 6 points | 1 comments


9. Show HN: After 2 weeks of learning Swift, I've published my first iOS app

URL: #

Author: cdd_luka

Description: Hi y'all!

I am full stack web developer, and recently I started to mess around with Swift. I've been having a lot of fun and I actually build little Countdown app ( I know, how original..), but I just wanted to share it with the world!

Popularity: 3 points | 4 comments


10. Show HN: Web RAG to generate perplexity like answers from your docs [in browser]

Show HN: Web RAG to generate perplexity like answers from your docs [in browser] - Project Screenshot

URL: https://docs.akiradocs.ai/aiSearch

Author: sauravpanda

Description: How It Works - Offline Indexing: Docs are processed and embedded using the GTE-small model at build time.

Browser-Based Magic:

- SQLite database (stored in the browser) for vector search.

- Local embedding model for query processing.

- Local LLaMA model for response generation using WebLLM.

- Everything Happens Locally: No data leaves the user’s device.

Key Benefits

- No API Costs: Everything runs in the browser—zero backend expenses.

- Unlimited Chats: No rate limits or usage restrictions.

- Privacy-First: Your data stays on your device, always.

You can find the code here: https://github.com/Cloud-Code-AI/AkiraDocs

Popularity: 5 points | 1 comments


11. Show HN: PQC.club – Post-Quantum Cryptography Tools and Alternatives

Show HN: PQC.club – Post-Quantum Cryptography Tools and Alternatives - Project Screenshot

URL: https://pqc.club/

Author: merlin_sh

Description:

Popularity: 6 points | 0 comments


12. Show HN: A newsletter for teenagers to build their dream career

Show HN: A newsletter for teenagers to build their dream career - Project Screenshot

URL: https://www.dream.career/

Author: designthefuture

Description: Hey everyone,

I’m Simon, a 29-year-old entrepreneur recognized in Forbes 30 Under 30 in 2022 for my work on improving financial education for Gen Z. But I wasn’t always a straight-A student—far from it. I struggled in school and was a late bloomer who constantly felt left behind.

One teacher told me, “The job you’ll have as an adult probably hasn’t been invented yet.” She was right. As technology evolves at lightning speed, I can't predict the opportunities of the future, but I can teach the timeless skills, habits, and mindsets that can help you grab those opportunities.

I’ve also noticed a wave of harmful “get rich quick” ideologies aimed at teenagers. To counter that, I created dream.career—a free, weekly newsletter designed to give teens practical skills school often overlooks:

- Boost creativity & problem-solving

  • Save, invest, and build financial freedom
  • Find opportunities, take smart risks, and create your own luck
  • Turn hobbies and passions into income
  • Build gratitude, confidence, empathy, and courage

    Each issue delivers simple, actionable lessons that have helped me (and others) build fulfilling, sustainable careers. No gimmicks, no toxic narratives—just real skills and mindsets that work in any era.

    If you’re interested or want to share feedback, check out dream.career. I’d love to hear your thoughts or suggestions on making this more impactful for the next generation.

Popularity: 3 points | 2 comments


13. Show HN: Turn Your Study Materials into Interactive Quizzes with AI

Show HN: Turn Your Study Materials into Interactive Quizzes with AI - Project Screenshot

URL: https://syncstudy.app

Author: bukunmiadewale3

Description: Hi Hacker News,

I'm excited to share the launch of SyncStudy, a web application that helps students, tutors, and professionals upload study materials, generate quizzes from them, and collaborate with others by sharing these quizzes. It's designed to make learning smarter, more interactive, and more efficient.

Key Features:

  • Upload Study Material: Upload any study document (e.g., PDF, text) and generate quizzes instantly.
  • AI-Powered Question Generation: SyncStudy uses AI to automatically create relevant questions based on the uploaded content.
  • Share & Collaborate: Share quizzes with friends, classmates, or colleagues for collaborative learning.
  • Cross-Industry Use: Although designed for students, the tool is also useful for tutors, trainers, and professionals.

    Why It’s Different: SyncStudy is not just another quiz generator. It's designed for efficiency—save time by converting study materials directly into valuable quizzes for faster review and learning. Our AI engine ensures that the questions are relevant and cover the material in a meaningful way, which can be extremely useful for exam prep, training sessions, or even creating personalized learning content.

    We’re currently working on expanding features like:

  • Support for more file types (e.g., Images)
  • Integration with other learning tools and platforms
  • AI-driven suggestions for study improvement

    If you're interested in learning more, please check out the website: https://syncstudy.app

    Feedback Wanted! As we're a small team (actually just me at the moment ), any feedback, ideas, or suggestions would be greatly appreciated. I’d love to hear how this could be improved to better serve students, teachers, or professionals in various fields.

Popularity: 2 points | 3 comments


14. Show HN: Eunomia, Open Source Data Governance for LLM-Based Applications

Show HN: Eunomia, Open Source Data Governance for LLM-Based Applications - Project Screenshot

URL: https://github.com/whataboutyou-ai/eunomia

Author: pvalfre

Description: Like many of you, we've spent the last two years dealing with requests to sprinkle LLM-powered features everywhere.

One recurring problem we faced in almost every project was related to data governance. In most cases, it was extremely hard to implement the needed granular control over the retrieved data.

We developed custom solutions each time, but when we realized most of the solutions could be reused in subsequent projects, we started thinking about creating a modular framework.

Today we're releasing that framework! We've already built some modules using open-source solutions such as Microsoft Presidio (1) or custom fine-tuned models like our own Financial BERT (2), but the goal is to let you play with it and add the modules you need for your own use case.

Leave a star on GitHub if you find this problem interesting, join our community if you want to stay in the loop, and let us know what you think about Eunomia! We'd love to hear your feedback!

(1) https://github.com/microsoft/presidio (2) https://huggingface.co/whataboutyou-ai/financial_bert

Popularity: 4 points | 0 comments


15. Show HN: Amurex.ai – an open source AI meeting copilot

Show HN: Amurex.ai – an open source AI meeting copilot - Project Screenshot

URL: https://www.amurex.ai/

Author: jxsa

Description:

Popularity: 3 points | 1 comments


16. Show HN: Yout.com API

Show HN: Yout.com API - Project Screenshot

URL: https://yout.com/api/

Author: nadermx

Description:

Popularity: 2 points | 2 comments


17. Show HN: GuessGPT: Can You Predict What ChatGPT Loves Most?

Show HN: GuessGPT: Can You Predict What ChatGPT Loves Most? - Project Screenshot

URL: https://guessgpt.vercel.app

Author: alpsencer

Description: I built GuessGPT, a web game where you try to guess ChatGPT's answers to subjective questions like "What is the best movie ever?" and "What is the most delicious food in the world?"(no signup required)

I was curious about how ChatGPT's "opinions" are formed and wanted to create a fun way to explore its internal knowledge. This project aims to give us a glimpse into how ChatGPT's responses are shaped.

What's different: Unlike a trivia game, there are no right or wrong answers. It's about understanding how ChatGPT "thinks". The game gets more interesting as you start to notice patterns in its responses. Also, you will be able to compare your answers to others' soon, so we can get a sense of how ChatGpt's answers compare to the community.

Try it out here: https://guessgpt.vercel.app

Feedback Request: I'm looking for feedback to make GuessGPT even better. Feel free to share your thoughts and suggestions, especially on:

What other questions should I add?

What features would make the game more engaging?

Did any of ChatGPT's answers surprise you?

Technical Details: I obtained both the initial questions and the answers from the GPT-4o model via its API with temp=0 settings. The code is open source, updated link is on the game's website.

Here is the prompt to get these answers: """You are a helpful assistant. Provide only a one entity answer. Do not offer explanations or context. The answer must be one entity if possible only one word. Do not use "unclear," "debatable, "subjective" or similar words. Give a definitive, one entity response."""

Popularity: 2 points | 2 comments


18. Show HN: migrate-to-uv – Migrate a project from Poetry/Pipenv to uv

Show HN: migrate-to-uv – Migrate a project from Poetry/Pipenv to uv - Project Screenshot

URL: https://github.com/mkniewallner/migrate-to-uv

Author: eatox

Description:

Popularity: 4 points | 0 comments


19. Show HN: I made a web app that generates resumes and cover letters for free

Show HN: I made a web app that generates resumes and cover letters for free - Project Screenshot

URL: https://www.careercrate.io/free-cover-letter-generator

Author: devbrianwhite

Description: I wanted to share a project I've been working on since October '24. It's an AI-powered toolkit designed to help job seekers shorten their job hunt and advance their careers.

The idea came from my own experiences and frustrations with the job application process, both as a job seeker and a hiring manager. I wanted to simplify and streamline how people present their skills and experiences to potential employers. By leveraging AI (GPT-4o), CareerCrate.io can generate tailored application materials in minutes, for free - no sign up required.

I'm also developing some optional advanced features like Pursuit™, a tool for job seekers, and SkillForge™, a personalized skill development platform, which will be available with a Pro subscription ($9/month).

I'm sharing this with the HN community to get your thoughts and feedback. I'm especially interested in how the AI performs in generating useful content and any suggestions on improving the tool. Please let me know what you think!

Popularity: 4 points | 0 comments


20. Show HN: A Modular Next.js SaaS Boilerplate

Show HN: A Modular Next.js SaaS Boilerplate - Project Screenshot

URL: https://www.faststartup.dev/

Author: codebymedu

Description: This allows me to release a Micro SaaS every week.

Popularity: 3 points | 0 comments


21. Show HN: MCP Bridge – Access Local MCP Servers Remotely

Show HN: MCP Bridge – Access Local MCP Servers Remotely - Project Screenshot

URL: https://github.com/EvalsOne/MCP-bridge

Author: everfly

Description: I built a bridge that lets cloud-based AI tools to communicate with local MCP servers. It converts HTTP/HTTPS to Stdio and includes Ngrok tunneling + token auth, and enable cloud-based tools to integrate local MCP servers easily.

Repo: https://github.com/EvalsOne/MCP-bridge

Feel free to check the demo video of how I use it to add MCP servers to my own AI tool and automate my daily tasks. https://youtu.be/puSDNPogscQ?si=rWkvRkoRLlMQO1um

Happy holiday, and I would love your feedback :)

Popularity: 3 points | 0 comments


22. Show HN: VeganHub – The Largest Online Collection of Vegan Resources

Show HN: VeganHub – The Largest Online Collection of Vegan Resources - Project Screenshot

URL: https://veganhub.co/

Author: veganhub

Description: I just launched VeganHub, a platform that gathers the best vegan resources all in one place. Whether you're vegan, vegan-curious, or simply exploring a sustainable lifestyle, you'll find curated articles, books, documentaries, podcasts, and videos to inspire and educate.

I am on a mission to make veganism more accessible and empowering by providing a central hub for information and community.

Would love your thoughts and feedback!

Popularity: 2 points | 1 comments


23. Show HN: Key Equals Value Semicolon, Or: A configuration format

Show HN: Key Equals Value Semicolon, Or: A configuration format - Project Screenshot

URL: https://github.com/aburdulescu/kevs

Author: aburdulescu

Description: Bored during the holidays, what else could I do then to invent yet another configuration format :). Have a look and enjoy :)!

Popularity: 3 points | 0 comments


24. Show HN: A free embeddable video chat for the web

Show HN: A free embeddable video chat for the web - Project Screenshot

URL: https://github.com/vasanthv/hello

Author: vasanthv

Description:

Popularity: 3 points | 0 comments


25. Show HN: I made an Neuroscience-Inspired Memory Layer for LLM Applications

Show HN: I made an Neuroscience-Inspired Memory Layer for LLM Applications - Project Screenshot

URL: https://github.com/harishsg993010/HawkinsDB

Author: mrxhacker99

Description: hey folks! hope you are doing well! I was reading a book called a thousand brain theory it was really fascinating to understand how our brain store concepts in a internal map kind of structures , Inspired by this I implemented an opensource memory layer for LLMs which supports semantic and procedural and episodic memory feel free to try it and let me your feedback

Popularity: 3 points | 0 comments


26. Show HN: Autofill dates and time slots in Notion

Show HN: Autofill dates and time slots in Notion - Project Screenshot

URL: https://app.popinvoice.com/datepop

Author: alfarez

Description: Hello!

Merry Christmas and I hope you’re having quality time with your friends, family, and yourself!

So I’ve been working on a new feature for my Notion date autofiller, and it is now launched: automatically create date and time slots for each day!

This has been a slog, TBH. It's supposed to be a quick build but it took ages! Thanks to overthinking, and over-engineering :). I had to pause and cut it back down so I can finally finish and launch it.

I designed this feature to help with all kinds of workflows:

- Notion Habit Trackers: Instantly fill your daily habit check-ins and save time setting it all up.

- Project Timelines: Automatically create time slots for tasks, so you can stay on track without extra work.

- Trip Planners: Plan your trip easily by instantly filling time slots for activities and events.

Anyway, here’s how you can try it out:

1. Go to https://app.popinvoice.com/datepop. 2. Select "Multiple rows per day". 3. Select your Notion database to autofill. 4. Configure the time slots and one or more properties to fill. 5. Run it!

If you’ve been using DatePop or thinking about it, I’d love for you to try it for FREE at https://app.popinvoice.com/datepop and let me know what you think. I’m always looking to improve it!

Thanks for your support and feedback!

Popularity: 2 points | 0 comments


27. Show HN: I Made a SEO Content Generator That That Learns from Competitors

Show HN: I Made a SEO Content Generator That That Learns from Competitors - Project Screenshot

URL: https://www.seokatana.com/

Author: Yossi_Segev

Description: Hi Everyone,

I'm Yossi, the founder of SEO Katana I'm an indie hacker by night and a senior full stack dev by day.

I've been building products for the past 18 years and I love every minute of it. SEO doesn’t need to be complicated. In fact, I feel we may be doing SEO backward! SEO Katana lets you start with the “end result”. A well-written, long-form content that will rank on relevant keywords.

Popularity: 2 points | 0 comments


28. Show HN: AI-Powered Investment Copilot

Show HN: AI-Powered Investment Copilot - Project Screenshot

URL: https://lambdafinance.ai/en

Author: shusuke

Description:

Popularity: 2 points | 0 comments


29. Show HN: I built and deployed a functional app using v0 with just 5 prompts

Show HN: I built and deployed a functional app using v0 with just 5 prompts - Project Screenshot

URL: https://www.youtubethumbnail-downloader.com/

Author: ahmednabi

Description:

Popularity: 2 points | 0 comments


30. Show HN: Fiddlebops – A web-based music box game inspired by Incredibox

Show HN: Fiddlebops – A web-based music box game inspired by Incredibox - Project Screenshot

URL: https://fiddlebops.one/

Author: myncepu

Description: I spent a few hours building this musical toy using Cursor. It's a browser-based music creation game where you can mix different sounds and beats to create your own music, similar to Incredibox. Built it for fun and to experiment with web audio. Try it out and let me know what you think!

Popularity: 2 points | 0 comments


31. Show HN: My friends and I launched an app to streamline RFPs with AI

Show HN: My friends and I launched an app to streamline RFPs with AI - Project Screenshot

URL: https://proposalup.com

Author: brucecantarim

Description: Hey HN!

My friends and I have been working on Proposal Up, an AI-powered platform to streamline the RFP process. It helps you create better RFPs and find the right vendors faster.

We’re excited to share our open beta with you and get your feedback!

Popularity: 2 points | 0 comments


32. Show HN: Stack Your Project

Show HN: Stack Your Project - Project Screenshot

URL: https://mildspring.co/stack-your-project/

Author: naeemnur

Description: Inspired by the Million dollar homepage, Stack Your Project is a fun and simple way to promote your project, business, or idea. By purchasing a block, you claim a spot in the stack, showcasing your project to visitors.

Popularity: 2 points | 0 comments


33. Show HN: ShortsKing: Automate Your Short Video Content

Show HN: ShortsKing: Automate Your Short Video Content - Project Screenshot

URL: https://shortsking.com

Author: jjatinggoyal

Description:

Popularity: 2 points | 0 comments


34. Show HN: No-Code Emoji Rating Popups

Show HN: No-Code Emoji Rating Popups - Project Screenshot

URL: https://www.usersurvey.ai

Author: codebymedu

Description: UserSurvey.ai helps you gather feedback fast with simple emoji rating popups. Just embed one script, create surveys in one place, and see responses in real time. Perfect for indie hackers who want quick product insights without heavy coding.

Popularity: 2 points | 0 comments


35. Show HN: PicTune – Turn your photos into music playlists

Show HN: PicTune – Turn your photos into music playlists - Project Screenshot

URL: https://pictune.ai

Author: processing

Description:

Popularity: 2 points | 0 comments


36. Show HN: I Built an Email Agent to Filter Emails Based on Your Knowledgebase

Show HN: I Built an Email Agent to Filter Emails Based on Your Knowledgebase - Project Screenshot

URL: https://pingg-henna.vercel.app/

Author: ghulammurtaza

Description: Looking for one user to test it out for me. ill provide the test credentials. you wont have to login using your own email. Please please please email me at murtazash123@gmail.com

Popularity: 2 points | 0 comments


37. Show HN: I made a Unix-like kernel, Goldspace

Show HN: I made a Unix-like kernel, Goldspace - Project Screenshot

URL: https://github.com/Goldside543/goldspace

Author: Goldside543

Description: This is my little hobbyist kernel, Goldspace! It runs on x86 processors and has been in the works for almost 6 months now! It's far from complete (can't switch to ring 3 yet), but by default, it runs using a built-in shell named Gash, which you can use to play around with the kernel!

Now, the kernel isn't all! Once I get the kernel stable and ready for user space, I'll make an OS (current name is planned to be PolarisOS) to show Goldspace's ability!

It is a multitasking kernel, preemptive multitasking to be exact. The scheduler is round-robin, which was the easiest to implement.

Developing it has been a wonderful experience, and if you like my work, leave a star on the GitHub page! :D

Popularity: 2 points | 0 comments


38. Show HN:Add User in a C Program

Show HN:Add User in a C Program - Project Screenshot

URL: https://github.com/LorenzoPiombini/libuser

Author: Lore87

Description:

Popularity: 2 points | 0 comments


39. Show HN: CommunisP, Peer-to-Peer (P2P) Encrypted (E2EE) Chat (Web)App

Show HN: CommunisP, Peer-to-Peer (P2P) Encrypted (E2EE) Chat (Web)App - Project Screenshot

URL: https://CommunisP.com/

Author: superninaj43

Description: Meet CommunisP, a real-time peer-to-peer chat platform that leaves no room for eavesdroppers. We built it from the ground up on ephemeral ECDH encryption (signed via ECDSA) and HKDF-based, re-keying every 60 seconds—so you stay in control of the conversation at all times. No middleman servers store or forward your messages; you connect directly peer-to-peer, using a minimal signaling layer and a custom STUN-like approach for NAT traversal.

No sign-ups required—just real P2P chat with robust E2EE and rapid key rotation. If privacy matters to you, CommunisP has you covered.

Key Advantages Ephemeral E2EE Each chat session is protected by short-lived ECDH keys (with ECDSA signatures to thwart man-in-the-middle). Combined with HKDF and automatic key rotation, your encryption is always fresh—limiting exposure even if one key is compromised.

True Peer-to-Peer Messages and files flow directly over WebRTC Data Channels. We chunk and encrypt file transfers end to end, so there’s no central server bottleneck or archiving your data.

Rapid Re-Keying Every 60 seconds, we regenerate ephemeral keys using HKDF, giving you continuous forward secrecy rather than a static “one key per conversation” approach.

“Ping” Push Notifications Want to nudge a contact to come online? We provide an optional push system that sends minimal metadata only: the sender’s nickname, a short message, and a link. This design reduces the private data exposed to notification services—responding to privacy concerns about providers like Apple leaking push notification metadata.

Minimal Backend Footprint We do keep a simple server for NAT punching and push subscriptions, but not for hosting or storing your messages. You control your own peer connections and decide how or whether you want push notifications at all.

Ready to try a Signal-level secure alternative that cuts out the centralized middleman? Check out CommunisP and experience real-time, ephemeral, peer-to-peer encryption firsthand.

Live Site: https://CommunisP.com/

Popularity: 2 points | 0 comments


40. Show HN: Redplus – A browser extension for better Reddit marketing

Show HN: Redplus – A browser extension for better Reddit marketing - Project Screenshot

URL: https://redplus.ai/

Author: EasyComment

Description: Hi HN! I built Redplus to help developers and creators better monitor and engage with Reddit discussions. It's a free browser extension that combines keyword monitoring with AI assistance.

Core features:

  • Automated keyword monitoring across Reddit
  • AI-powered relevant response suggestions

    The tool was born from my own need to efficiently track and engage in relevant Reddit discussions about my projects. It aims to help creators participate in conversations more effectively while maintaining authentic engagement.

    Try it out: https://redplus.ai

    Looking forward to your feedback and suggestions!

Popularity: 1 points | 0 comments


41. Show HN: Simple AI Chrome extension enabling chatting with web pages

Show HN: Simple AI Chrome extension enabling chatting with web pages - Project Screenshot

URL: https://talk2page.vercel.app/

Author: saltmineworker

Description: Transform any webpage into an AI-powered knowledge base with Chrome extension. Just add your OpenAI api key and start chatting. Extension scrapes the page content and allows you to chat with the content.

I would like to get some feedback is this any useful, how to develop and so.

Popularity: 1 points | 0 comments


42. Show HN: Twice – Chrome Extension for Thinking Twice Before Social Media

Show HN: Twice – Chrome Extension for Thinking Twice Before Social Media - Project Screenshot

URL: https://github.com/chaosprint/twice

Author: chaosprint

Description:

Popularity: 1 points | 0 comments


43. Show HN: Think Book – Ask One Question a Day

URL: #

Author: phemartin

Description: One year ago, Think Newsletter (https://thinknewsletter.com) was created. The idea was simple: one question a day to spark new thoughts.

One question led to another, and soon enough, we had a unique question for each day of the year. That's when I realized it would be perfect as a book! (https://thinknewsletter.com/book).

The book is a beautiful artifact that people can carry and journal with — or even share with others.

This is a collection of 366 thought-provoking questions.

These questions are designed to challenge conventional thinking, generate ideas, and guide decision-making.

I hope you love it!

Popularity: 1 points | 0 comments


Conclusion

Today's Show HN roundup showcases a diverse range of innovative projects. From AI-powered tools to creative coding solutions, these projects reflect the dynamic nature of our tech community. Which project caught your attention the most? Let us know in the comments!

Tags: #ShowHN #TechInnovation #DeveloperProjects #AI Applications #Open Source Software