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