GitHub Visualizer - Enter user/repo and see the project visually
Startup Stash - A curated directory of 400 resources & tools for startups
CodeFlower - CodeFlower visualizes source code repositories using an interactive tree.
StartupResources.io - Tightly curated lists of the best startup tools
Gource - Gource is a software version control visualization tool.
Founded X Startup Stats - Find the best country to build your startup in