SubEthaEdit

The powerful plain text and source editor thats native on macOS. Free and open source.

The app that started the collaborative editing revolution is back. Write articles, code, notes or meeting minutes with friends – wherever they are. Ideal for extreme programming sessions.

SubEthaEdit kickstarted collaborative editing with its easy and immediate way to connect and edit. Just add your co-workers to the document and start typing. No complicated setup, browser or Internet required.

2003 Apple Design Award Winner.

Features:

• Syntax Highlighting and Autocomplete for ActionScript, bash, C, C++, CSS, ERB, Erlang, Elixir, Go, HTML, Java, Javascript, JSON, LaTeX, Lua, Markdown, Objective-C, Perl, PHP, Python, Ruby, TOML, wren and XML

• Extensible architecture for custom modes for your favorite language or format

• Regular expression search and replace

• Extensive support for converting and reading text-encodings

• Bracket matching

• Code folding

• Autocomplete based on your content

• Word counter, invisible characters

Collaboration:

• Collaboration over the Internet or the local network

• Read-only mode for network documents

• Public and private network documents