I have written a thin but useful layer on top of parts of Control.Concurrent and Control.Exception to aid in forking new threads. I think I have written it correctly and understand the guarantees (when running under GHC 6.4 or 6.6). It is useful when * you need to be able to check whether a thread has finished running * you need to be able to wait until a thread has finished running * when you want to run within the scope of 'block' * you need to run in another thread with ** an exception handler (catch) ** a finally clause ** bracket commands But it may need improving, especially if I have missed a subtle blocking or race condition. And suggestions on improved names are welcome. The code is on the wiki at http://haskell.org/haskellwiki/WrapConc -- Chris