Helium - Helium lets you accept payments by credit card for anything you want to sell online.
Product Hunt Shell - A geeky, web-based shell for browsing Product Hunt
PiPer - A DIY Minecraft computer to build gadgets
Screen Commander - Blank your screens at the click of your mouse.
Pennywise - Cross-platform application to open any website or media in a floating window
ZoomIt - Presentation utility for zooming and drawing on the screen.