Aaron Brethorst has a little page of his code samples up at http://www.brethorsting.com/code/ which include a few interesting items including a software version of the Enigma machine in C#. Cool stuff. Aaron is also the author of iRooster, an alarm clock application (that uses playlists from iTunes) which also looks neat, but runs on the Mac so it isn’t something that I have any real use for… :).