GitHub Visualizer - Enter user/repo and see the project visually
Refactor.io - Share your code instantly for refactoring and code review
Github Profile Visualizer - Tool for visualizing GitHub profiles
Codacy - Automatically reviews code style, security, duplication, complexity, and coverage on every change while tracking code quality throughout your sprints.
The GitHub Matrix Screensaver - Latest commits from GitHub visualized Matrix-style
CodeStream - CodeStream helps development teams resolve issues faster, and improve code quality by streamlining code reviews inside your IDE