Federacy - Bug bounty and security testing platform.
Little Star - Efficiently and easily manage your GitHub stars
IssueHunt - IssueHunt is a crowd funding service for opensource contributors and owners!
Contributions for GitHub - Show your GitHub contributions graph on your iOS Devices
HackerOne - HackerOne provides a platform designed to streamline vulnerability coordination and bug bounty program by enlisting hackers.
GitDailies - Get a daily snapshot of your team's GitHub Commit and PR activity.