Kod is a programmers' editor for OS X

Download latest stable release at http://kodapp.com/download/ (or from an alternative mirror: http://data.hunch.se/kod/kod-0.0.3.zip)

Source available at http://github.com/rsms/kod

Goals and features

• Fully concurrent — loading files, syntax highlighting, etc is distributed across available CPU cores. Minimal waiting time.
• Integrated scripting environment based on Node.js.
• Written from scratch with modern OS X 10.6 APIs providing maximum OS integration while avoiding reinvention of the wheel.
• Sports a Chromium-like user interface where tabs can be torn off and moved between windows.
• Allows editing (although not saving, currently) remote files accessible over HTTP or HTTPS.
• Styling of the editor (not only the syntax highlighting) through regular CSS 3.
• Comes with support for over 65 different languages/syntaxes which can easily be edited or extended (Kod uses the same format as GNU Syntax Highlight).
• And more awesome features...

Here's a (probably outdated) screenshot: