Anatolia MUD is a Multi-User Dungeon game based on Diku MUD. Anatolia is another name for Asia-Minor: where Asia and Europe intersect. Anatolia MUD is a text based multi-user game. For further details please visit: http://anatoliamud.sf.net
Rex is a regular expression library which implements most of the POSIX 1003.2 specification. It is very mature and has been in heavy production use by thousands of users, on many platforms, since 2002.