Refined GitHub - Browser extension that makes GitHub cleaner & more powerful
Finale - Finale, the world standard for music notation software, lets you compose, arrange, notate, and print engraver-quality sheet music.
GitZip - Download or create a download link for a GitHub project folder/sub-folder or file.
Mythos - Mythos is an Action and MMORPG video game published by Hanbit Soft and developed by Flagship Studios.
Zube - Project management for developers.
Huboard - HuBoard is built from the ground up using the GitHub public API.