http://www.circlemud.org I had fun intalling this on freebsd and getting it to run. You can open the code and make mods to the mud and enjoy playing your mods. Apply the patches from the ftp site. Others can come in and enjoy your mods. I learned alot about C programming from modifying this software and had fun playing with the mods I created. For instance, mod the software to have Puff roam around town instead of hanging out in Limbo. RO mud did this. Is it still around?