Janetter - Janetter is a Twitter client application. Faster, smarter, and more powerful.
Refined GitHub - Browser extension that makes GitHub cleaner & more powerful
YoruFukurou - YoruFukurou (NightOwl) is a Twitter client for Mac OS X, designed for Twitter addicts.
GitZip - Download or create a download link for a GitHub project folder/sub-folder or file.
Talon for Twitter - Elegantly designed, ad-free Twitter experience for Android
Board for Github - A webview based GitHub project app with native features