Rainglow Color Themes - 320+ color themes for a variety of editors and software.
GHuser - Better GitHub profiles for everyone
Slack Themes - Make your Slack pretty with custom themes
Octohunt - Search to find developers in your city on Github.
eM Client - eM Client is a fully-featured email client for Windows and macOS with a clean and easy-to-use interface. eM Client also offers features for calendars, tasks, contacts, notes, and chat.
GitHub Visualizer - Enter user/repo and see the project visually