Helium - Helium lets you accept payments by credit card for anything you want to sell online.
TestFlight - iOS beta testing on the fly.
PiPer - A DIY Minecraft computer to build gadgets
TestFairy - Painless Beta Testing
Pennywise - Cross-platform application to open any website or media in a floating window
TestApp.io - A platform that helps both mobile app developers and owners to easily share their apps with everyone to get feedback before reaching publicly to Google and App stores.