Top 10 Open-Source Picks: September 17
A curated look at the 10 open-source repositories that dominated developer attention on Thursday, September 17, 2026. From trending newcomers to steadily-growing community favorites, here is what mattered most.
cloudflare/security-audit-skill
A coding-agent skill for multi-phase security audits with independently verified, machine-readable findings
anthropics/knowledge-work-plugins
Open source repository of plugins primarily intended for knowledge workers to use in Claude Cowork
supabase/supabase
An open-source backend platform with Postgres, auth, storage, and real-time APIs
Tencent/WeKnora
Open-source LLM knowledge platform: turn raw documents into a queryable RAG, an autonomous reasoning agent, and a self-maintaining Wiki.
garrytan/gstack
Use Garry Tan's exact Claude Code setup: 23 opinionated tools that serve as CEO, Designer, Eng Manager, Release Manager, Doc Engineer, and QA
aishwaryanr/awesome-generative-ai-guide
A one stop repository for generative AI research updates, interview resources, notebooks and much more!
Editor's Takeaway
On September 17, 2026, these 10 repositories captured the attention of developers worldwide. Leading the charge were security-audit-skill, voicebox, knowledge-work-plugins alongside 7 other compelling projects, with each representing a different facet of where open-source momentum is heading. What ties them together is community trust: high star counts, active contributors, and real-world utility. If you haven't already, explore each project on its detail page, check out the contributor leaderboard, and consider starring the ones that solve problems you care about. Open source thrives when people engage, and these 10 repos are the proof.