OpenGrok - OpenGrok is a fast and usable source code search and cross reference engine.
GitHub Visualizer - Enter user/repo and see the project visually
GrepCode - GrepCode.com is a code search engine built by developers for developers to search and browse open...
Widgetic - An App Store for every platform.
Krugle - Krugle is the complete enterprise solution for search targeted to the development organization.
Little Star - Efficiently and easily manage your GitHub stars