FilmHope - A/B test YouTube titles & thumbnails
DisplayFusion - DisplayFusion will make your multi-monitor life much easier.
Vibby - Create + share highlights from any video in seconds
Mizage Divvy - Divvy is an entirely new way of managing your workspace.
The YouTube Thumbnail Game - Guess which YouTube video thumbnail has more views
WindowGrid - Quickly and easily layout windows on a dynamic grid using just the mouse.