Top 70 Show HN Open-Source Projects & Libraries (September 2026)
launchesBrowse newly launched open-source repositories, developer libraries, and community software in September 2026. Use this list to explore open-source tools.
Hacker News Digests — September 20, 2026
https://computearena.ai— Compute:Arena – Community submitted local AI benchmarks
https://invoicecraft.com— Free invoice generator, 100% client-side – no signup, no server storage
https://wakapac.com— WakaPAC, a Win32-inspired reactive UI library for the browser
https://indexyour.link— Get Free SEO Backlinks
https://xapp-project.org— XApp – Apps that work everywhere
https://calmscroll.com— Calmscroll – a reader that shows the current paragraph in the library
https://wintty.io— A Windows terminal built on the Ghostty core
https://runerrand.dev— Open-source AI teammates with their own computer
https://vinix-os.org— Vinix – A modern operating system written in V
https://vercel.app— Open Source Lightroom
https://mockfreeli.org— Paste a song and get 5 license-free cousins that sound like it
https://ainglish.org— Ainglish, an English dialect for AI agents
https://repodify.app— Repodify: Make Podcasts Out of Podcasts
https://sourcererapp.com— Sourcerer: Fast Git client written in C++ version 1.0.24 released
https://jev.directory— Jev.directory – A community directory for Jev primitives
https://bend-lang.org— The Bend Programming Language
https://page-rage.com— Free game to destroy any web page
https://thingstohave.app— Things To Have – free, privacy caring, mighty wishlist app
https://ppplayer.com— PPPlayer – An open-source music player built with Flutter
https://claude-code-from-source.com— Claude Code from Source
https://hypercomb.io— Hypercomb – AI open software platform
https://agentmemoryleaderboard.ai— An open Add/Search evaluation framework for agent memory
https://jinx.fyi— Jinx – a link shortener you host free on GitHub Pages
https://greenscreenremover.net— Green Screen Remover – free in-browser chroma key, nothing uploaded
https://snapbracket.com— Free Tournament Bracket Maker and Generator
https://heif-heist.com— HEIF Heist- Hacking OpenAI, Slack, Meta, GitHub and Many Others
https://aitexttospeech.net— Free Unlimited AI Text to Speech – No Sign Up
https://p2panda.org— P2panda – Building blocks for P2P apps
https://builtbyvibe.dev— BuiltByVibe – Directory of vibe-coded apps with a free MCP server
https://fsfp.ir— Ada & Zangemann book about free software translated in Persian / Farsi
https://loretypes.com— Three short quizzes that show a score pattern, not one type
https://wowforeverwiki.org— An evidence-ranked wiki for World of Warcraft: Forever
https://mostro.community— MostroEuropa is now a trusted Mostro community
https://openjev.com— OpenJev
https://apache.org— Apache Ossie – (incubating) universal standard for semantic data
https://neruva.io— AI agents design an open chip, the best one gets fabricated
https://openpeeps.com— Open Peeps – A hand-drawn illustration library
https://reallyfree.app— ReallyFree
https://thestoiclibrary.com— The Stoic Library
https://openchallengelist.com— Open Challenge List
+ 30 more verified launches in full dataset...
Key Launch Stats (Show HN Open-Source Repositories — September 2026)
During September 2026, a total of 70 product launches were recorded in this category up to 2026-09-20.
Here is a quick look at launch activity and naming characteristics:
- Total Launches: 70 domains
- Busiest Launch Day: 2026-09-18 (22 launches)
- Average Domain Name Length: 10.1 characters
- Shortest Domain: jev.directory
- Longest Domain: superintelligence-statement.org
- Clean / Single-Word Domains: 85.7%
- Common Name Prefixes: open (6), ai (2), the (2), get (1), dev (1)
- Common Keywords: ai (13), app (11), ui (10), dev (8), cli (4)
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.