lightningcss

webpack is an open-source JavaScript project in the build tools space with 65.8k GitHub stars. The repository is actively maintained, with recent commits.

Parcel is a zero-configuration web application bundler that automatically detects and transforms assets (JS, CSS, HTML, images, and more) out of the box, using a multicore architecture and persistent caching for fast builds.

esbuild is a high-performance JavaScript/TypeScript/CSS bundler and minifier written in Go, designed to be 10-100x faster than traditional web build tools. It offers a unified CLI, JS, and Go API with built-in support for ESM/CommonJS, JSX, tree shaking, source maps, and plugins.

PostCSS is a tool for transforming CSS with JavaScript plugins. It parses CSS into an abstract syntax tree, lets plugins inspect and mutate it, then stringifies the result — powering everything from autoprefixing to future-syntax polyfills and minification.

Rollup is a JavaScript module bundler that compiles ES modules into optimized output across multiple formats (ESM, CommonJS, UMD, IIFE), with aggressive tree-shaking to eliminate unused code. It's widely used for bundling libraries and underpins build tools like Vite.

GitButler is a Git-based version control client with both a desktop GUI and a `but` CLI, built around virtual/stacked branches, easy commit editing, an undo timeline, and AI-assisted workflows. It acts as a friendlier, more powerful drop-in replacement for the vanilla Git interface in any existing repo.