Bun is a fast JavaScript runtime, bundler, test runner and package manager in one binary.. The tools below share its categories (Developer Tools, Open Source). Most are still pre-launch, so you are comparing direction and early access rather than finished feature lists.
Biome
LaunchedA fast formatter and linter for JavaScript, TypeScript, JSON and CSS in one tool.
Copperhead
LaunchedAn open-source AI engineering platform for designing, verifying and shipping circuit boards.
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.
rhun
LaunchedA small, fast, open-source code editor for Windows, Linux and macOS, written in assembly.
Vite
LaunchedA frontend build tool with a fast dev server and optimised production builds.
Woxi
LaunchedAn open-source Wolfram Language interpreter written in Rust, with a browser playground.
Zed
LaunchedA fast, open-source code editor written in Rust, with multiplayer editing and AI built in.
Jev Ultrafast
Betai. am. speed.
aclif
LaunchedA framework for building command-line tools that AI agents use to reach SaaS platforms.
Astro
LaunchedA web framework for content-driven sites that ships zero JavaScript by default.
boxes.dev
LaunchedCloud computers for coding agents such as Claude Code and Codex, managed from desktop, phone or terminal.
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