Snarl - Snarl is a notification system for Windows.
GitHub Visualizer - Enter user/repo and see the project visually
Notifu - Notifu, a free open source pop-up balloon utility
Codeology - Open-source algorithm that visualizes GitHub projects
Notify OSD - Canonicals on-screen-display notification agent, implementing the freedesktop.
SyntaxDB - Easily look up programming syntax for multiple languages