Open source developer tools worth starring
Every open source listing on the radar, most upvoted first.
Open source is the one part of this directory where you never have to take the teaser on trust: the code is there to read. This list puts every open source listing in one place, most upvoted first, so the question is less whether it exists and more whether the licence, the maintainers and the release cadence suit you.
33 tools

Jev Ultrafast
Betai. am. speed.

Plausible Analytics
LaunchedOpen-source, privacy-friendly web analytics without cookies.

Hono
LaunchedA small, fast web framework built on Web Standards that runs on any JavaScript runtime.

Payload
LaunchedAn open-source headless CMS and application framework built on Next.js.

Biome
LaunchedA fast formatter and linter for JavaScript, TypeScript, JSON and CSS in one tool.

Vite
LaunchedA frontend build tool with a fast dev server and optimised production builds.

Excalidraw
LaunchedAn open-source virtual whiteboard for sketching hand-drawn-style diagrams.

Convex
LaunchedA reactive backend where queries, mutations and schemas are written in TypeScript.

Prisma
LaunchedA TypeScript ORM with a declarative schema, migrations and a type-safe query client.

Copperhead
LaunchedAn open-source AI engineering platform for designing, verifying and shipping circuit boards.

Zoneless
LaunchedAn open-source payments platform positioned as an alternative to Stripe Connect.

Trifle
LaunchedOpen-source time-series metrics that work with your existing database.

rhun
LaunchedA small, fast, open-source code editor for Windows, Linux and macOS, written in assembly.

Extend UI
LaunchedAn open-source React UI kit for document apps: PDF, DOCX, XLSX and CSV viewers and more.

Woxi
LaunchedAn open-source Wolfram Language interpreter written in Rust, with a browser playground.

Drop
LaunchedA rootless Linux sandbox for isolating coding agents and third-party programs.

Ledge
LaunchedMarkdown notes that run shell commands, code, SQL and AI prompts in place.

Sesame
BetaAn open-source password manager that works without an account, with your vault as a local file.

Dub
LaunchedOpen-source link management with short links, analytics and conversion tracking.

Trigger.dev
LaunchedOpen-source background jobs and long-running workflows written in TypeScript.

Lenis
LaunchedA lightweight smooth scroll library from the studio darkroom.engineering.

Motion
LaunchedAn animation library for React, JavaScript and Vue, formerly known as Framer Motion.

PostHog
LaunchedOpen-source product analytics, session replay, feature flags and experiments in one platform.

Tailwind CSS
LaunchedA utility-first CSS framework for building designs directly in your markup.

shadcn/ui
LaunchedAccessible React components you copy into your project and own, built on Radix and Tailwind CSS.

Astro
LaunchedA web framework for content-driven sites that ships zero JavaScript by default.

Bun
LaunchedA fast JavaScript runtime, bundler, test runner and package manager in one binary.

Turso
LaunchedSQLite for production: a distributed database built on libSQL with embedded replicas.

Neon
LaunchedServerless Postgres that scales to zero, with instant database branching.

Zed
LaunchedA fast, open-source code editor written in Rust, with multiplayer editing and AI built in.

Supabase
LaunchedAn open-source backend built on Postgres: database, auth, storage, realtime and edge functions.

Compositor
LaunchedThe Photoshop alternative for Mac

Laya Mlx
LaunchedNative MLX runtime for Laya typed decision models — 7–14 ms short decisions on M3 Max. No text generation, PyTorch, or cloud API.
Everything here also sits in the Open Source category, which covers what to look for before you commit to one.