OneZero is a very simple application that shows how Haskell, Yesod and Server Events can work together. It is based on Yesod's chat subsite example: www.yesodweb.com/blog/2012/01/wiki-chat-subsite . Similar, slightly more complex project: github.com/nbartlomiej/tfoo .
Live at: onezero.herokuapp.com
Attention: Server Events are supported only by the following browsers: caniuse.com/eventsource .
MIT, see LICENSE file.