With respects to Ken MacKenzie (October 1999), I bring you the TSO XMAS tree.
Unless you have access to an IBM Mainframe, this application is pretty useless. However, if you do, it's fun!
Copy the plib/xmas.plib file into a member of your PLIB library, the exec/xmas.rexx into a member of your EXEC library, and type TSO XMIT on the command line to execute.
Merry Christmas!