The Tweet Hereafter - The last tweets of the deceased
Scotty - Scotty is a Haskell framework inspired by Ruby's Sinatra.
Scavenger - An augmented reality scavenger hunt for cash prizes
Yesod - Yesod is a development tool used to create highly efficient websites and web applications from the ground up. Yesod includes almost everything you need to build a website, from templates to routing and execution. Read more about Yesod.
Boxhead: The Rooms - A Classic Internet Zombie-Hunting Game
Happstack Lite - Happstack itself is a web framework created in Haskell. Happstack Lite is an easier version to use that can import features from the heftier version if need be.