Refined GitHub - Browser extension that makes GitHub cleaner & more powerful
Rainglow Color Themes - 320+ color themes for a variety of editors and software.
GitZip - Download or create a download link for a GitHub project folder/sub-folder or file.
Themer - Personalize themes for your terminal/editor/wallpaper/slack
Board for Github - A webview based GitHub project app with native features
Lip Gloss - Design terminal user interfaces