Repo Hunt is an mobile application that allows you to discover and share most trending GitHub repositories
GHuster turns your GitHub profile into a beautiful profile page. Sign in to create yours.
Gitstalk is a Web app that allows you to sneak peek into the recent activities of other GitHub users. No Login, No BS. Just enter the username and you are good to fly!
Github Profile Visualizer is a tool for visualizing a developer based on their GitHub contributions, field of contributions and a lot more.