A theme for Textmate 2 based on the GitHub user interface and the GitHub theme for TextMate 1.x, created by Scott Becker in 2008.
cd ~/Library/Application\ Support/TextMate/Managed/Bundles/
git clone git://github.com/disruptive/github_textmate_2_theme.git GitHub\ Theme.tmbundle
Copyright (c) 2012 Disruptive Ventures, Inc., released under the MIT license