Ranker - Ranker goes far beyond Top 10 lists with deep rankings about everything, voted on by everyone.
Rewala - Decision-making application
Listly - Listly is lists made made easy + social + fun! If you like lists, you will love Listly.
TierMaker - Create a tier list for anything
TwentyTwoWords - TwentyTwoWords is an aggregational site that gathers some of the hot topics on the Internet and displays them in a single place for you to read.
Clever - syncing between education applications for K-12 schools