Operating systems, kernels, shells, runtimes and low-level tooling.https://opensource.fyi/categories/systems/https://opensource.fyi/projects/bun/https://opensource.fyi/projects/bun/Bun is an open source JavaScript runtime with a built-in package manager, bundler and test runner, designed as a fast drop-in replacement for Node.js.Tue, 10 Nov 2026 14:10:00 GMTjavascriptruntimebundlerpackage-managerhttps://opensource.fyi/projects/deno/https://opensource.fyi/projects/deno/Deno is an open source JavaScript and TypeScript runtime built on V8 and Rust, with secure-by-default permissions, built-in tooling and npm compatibility.Tue, 10 Nov 2026 14:00:00 GMTjavascripttypescriptruntime