Top 617 Show HN Open-Source Projects & Libraries (March 2026)
launchesBrowse newly launched open-source repositories, developer libraries, and community software in March 2026. Use this list to explore open-source tools.
Hacker News Digests — March 31, 2026
https://how-awesome.libklein.com— How Awesome? annotates GitHub awesome lists with repo stats, stars, last commit
https://prepareyourself.app— I built a free AI study tool– paste notes, get flashcards in 10 seconds
https://trysailor.ai— Sailor.ai – source-backed personalized outbound emails
https://memctl.com— Memctl v0.1.0 Open source shared persistent memory for AI coding agents
https://modernaicourse.org— 10-202: Introduction to Modern AI (CMU)
https://peergos.org— Peergos: An EE2E P2P solution for sync and storage
https://libre.solar— Libre Solar – Open Hardware for Renewable Energy
https://shop.fsf.org— Emacs is shell root but no schwag?
https://openlinq.xyz— OpenLinq – invite-only link sharing for humans tired of AI slop
https://mind2app.org— A web-based vibe coding platform (works from your phone)
https://otava.apache.org— Apache Otava
https://mcpplaygroundonline.com— MCP Playground – free MCP test servers, inspector, and 10K+ server list
https://plagiarismremover.ai— Plagiarismremover.ai – A Free AI Plagiarism Remover
https://imagedojo.ai— Imagedojo.ai – Blind arena for Google, OpenAI, and xAI image generators
https://daysift.com— My ADHD girlfriend has 50 work tabs open, so I built ⌘J
https://praxisjs.org— PraxisJS – signal-driven front end framework and AI experiment
https://clawsight.org— ClawSight – Lightweight monitoring and kill switches for AI agents
https://seoscoreapi.com— SEO Score API
https://contractpulse.io— ContractPulse – Free intelligence on federal government contracts
https://clawapis.com— X402 based pay-as-you-go Twitter API and helius/solscan API for your OpenClaw
https://vaultara.co— Vaultara – Daily AI-Powered News Intelligence Reports
https://openclawdirectory.co.uk— OpenClaw Directory – Compare Deployers, Skills, and Tools for OpenClaw
https://littlefreelibrary.org— Little Free Library Books
https://ea.js.org— ea.js – Echelon Analytics
https://yourfinanceworks.com— YourFinanceWORKS – Open-source financial management with AI
https://open.tamago.chat— OpenTamago – P2P GenAI Tamagotch
https://dvc.org— DVC: Data Version Control
https://trybibby.com— Vibe code your scientific papers with an assistant I built(open source)
https://shellrouter.com— The OpenRouter for OpenClaw – Shellrouter.com
https://securos.org— Securos – Security-focused platform with hardened architecture
https://openbets.bot— OpenBets – AI agents build souls through prediction bets
https://crimpdeq.com— Open source Bluetooth dynamometer for climbing training
https://openberth.io— OpenBerth – Deploy AI-built apps and tools to your own server
https://emptychairs.org.uk— A Campaign to Tackle Loneliness – Empty Chairs
https://gitdelivr.net— GitDelivr: A free CDN for Git clones built on Cloudflare Workers and R2
https://iwp9.org— Submission Deadline for 12th International Workshop on Plan 9 ends March 9 2026
https://dailywatch.video— DailyWatch – Free video discovery across 8 regions
https://openjet.dev— Open-Jet – self-hosted Agentic TUI for air-gapped Jetsons
https://gitagent.sh— GitAgent – Clone a repo, get an AI agent – Claude Code / OpenClaw
https://explainme.ai— My OpenClaw agent built a website to explain AI to humans
+ 577 more verified launches in full dataset...
Key Launch Stats (Show HN Open-Source Repositories — March 2026)
During March 2026, a total of 617 product launches were recorded in this category up to 2026-03-31.
Here is a quick look at launch activity and naming characteristics:
- Total Launches: 617 domains
- Busiest Launch Day: 2026-03-04 (33 launches)
- Average Domain Name Length: 9.2 characters
- Shortest Domain: js.org
- Longest Domain: simpleagreementforliquidity.com
- Clean / Single-Word Domains: 90.3%
- Common Name Prefixes: open (40), get (10), ai (8), try (4), my (3)
- Common Keywords: ai (205), app (86), ui (77), agent (75), dev (57)
How to Use This Data
You can use this list of Hacker News and builder releases to find emerging tools, track indie projects, or connect with early-stage builders.
To browse or download the full master dataset of 15,500+ startup launches in CSV and JSON formats, visit the Launches Master Dataset.