SERP preview tool - Visualise how your website will appear in the search results
PiPer - A DIY Minecraft computer to build gadgets
OneNote - Get the OneNote app for free on your tablet, phone, and computer, so you can capture your ideas and to-do lists in one place wherever you are. Or try OneNote with Office for free.
PiP for Mac - Always on top window preview similar to the popular windows only OnTopReplica
Blogcast - Turn your articles into audio
Helium - Helium lets you accept payments by credit card for anything you want to sell online.