Write web apps in Microsoft Word
An extension to apt-get to allow the user the option to reverse package changes in a set period of time.
A punchcard computer
A malloc implementation
Debug programs by being able step backwards and forwards
A partial evaluator for lisp.rb
A hat to helps you never bite your nails again
Hum a tune and watch it transcribed into music!
Collaborative Whiteboard with Voice Chat
No-hassle itinerary sharing for event organizers through web and SMS.