Hi all, I'm Andy, the author of Manatee ( http://haskell.org/haskellwiki/Manatee ). You can watch video http://www.youtube.com/watch?v=weS6zys3U8k (or http://www.youtube.com/watch?v=A3DgKDVkyeM ) to understand "What is it?" . :) Manatee is Haskell integrated environment written in Haskell. The goal of the Manatee project is provide a fast, safe and flexible integrated environment for haskell hacking. Some cool feature in Manatee: * It can dynamic update Haskell extension code in runtime, like elisp for Emacs. * It protected every application in sandbox, so it minimum your losses once unexpected exception throw. * It's multi-thread design, it's won't freeze your operation in anytime. * It provide handy window manage, you can mix any application together fastly. * You can use keyboard control everything you want, and same experience in all applications. :) * You can use it develop any application you want, not just text toy. :) ... etc. I'm looking for new developer join Manatee Team, I believe you guys can develop cooler application than me. :) If you interested Manatee, welcome to join manatee-user@googlegroups.com (or https://groups.google.com/forum/#!forum/manatee-user ) Thanks, -- Andy PS. I'm working on session manager and IDE feature...