TextMate

TextMate is a macOS‑only source editor that follows Apple’s design philosophy, offering a tightly integrated, native experience for developers. It supports a wide range of programming languages and provides features such as multiple carets for simultaneous edits, powerful file‑wide search with previewable replacements, and built‑in version‑control indicators and diff views for major VCS systems.

The editor’s architecture relies on scoped settings, allowing different configurations, shortcuts, and preferences to be applied per language, project, or file type. Users can extend functionality through custom commands written in any language that interacts via standard input and output, and through bundles that package language support, snippets, macros, and workflows. Snippets and macros enable rapid insertion of reusable code patterns and automation of repetitive tasks.

Additional conveniences include clipboard history, custom themes, live HTML/Markdown preview, foldable code blocks, and soft‑wrap indentation. TextMate is open source, freely available, and considered stable for production use.