The best new open source tools,
analyzed.

A weekly briefing on the open source tools worth knowing. What they do, whether they're real, and whether you should care. No hype, no clickbait.

Weekly. Free. Unsubscribe anytime. · 1520 tools tracked.

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cindy80

Cindy is a desktop app that sits on top of the coding agents you already use. It drives Claude Code, Codex and Pi, switches harness or model mid-task while memory and skills carry over, and can split one task across agents to plan, build and review. XD Inc. makes it; the client is Apache 2.0 and free.

This week's featured tool →

This Week's Drop

November 8, 2026

cindy

9.4k ★

Cindy is a desktop app that sits on top of the coding agents you already use.

80Coding Agent Workspaces+1.0k/wk

baoyu-design

6.1k ★

Baoyu-design takes the design engine behind Anthropic's claude.ai/design and runs it inside the coding agent you already use.

80AI Agent Tools - Creative Skills+876/wk

Betterleaks

2.8k ★

Betterleaks hunts for API keys, tokens and passwords that leaked into git history, folders, GitHub and GitLab orgs, Hugging Face repos and S3 buckets, then can check whether each one still works.

72Secrets Scanning+182/wk

huashu-motion

2.4k ★

huashu-motion turns your coding agent into a launch-video studio.

72AI Agent Tools - Creative Skills+522/wk

leanrea

4.0k ★

leanrea is one 8 KB instruction file that teaches your coding agent to reverse engineer shipped software: Electron apps, native binaries, Go builds, APKs, databases and websites.

70AI Agent Tools - Skills+349/wk

Open Source Alternatives

Find open source tools for the paid services you already use.

Datadog31 alternatives

Cursor20 alternatives

GitHub Copilot16 alternatives

New Relic15 alternatives

OpenAI API12 alternatives

Snyk11 alternatives

See all alternatives →

Gaining Momentum

security-audit-skill

Cloudflare's security-audit skill turns a coding agent into a code auditor.

62.4k ★+9.2k/wkJavaScript

Gaining Momentum

DeepSeek Harness

DeepSeek Harness (dsh) is DeepSeek's own agent app: the layer that gives a model a shell, files, tools, skills and a UI, for coding and everyday work like spreadsheets and slides.

274.3k ★+8.1k/wkTypeScript

Gaining Momentum