ChaoticMUX - Social MUX where one can hang out and make friends. DynamixMUSH - Explorable areas and multiplayer attractions. Includes a space adventure, an ocean rpg, and a variety of player run areas.
Free building is encouraged.
Includes the MUSH 101 schoolhouse for new MUSHers. The latest versions of PennMUSH are beta-tested here. Shambala MUSH - Log in, meet and chat with people from all over the world, play games, and just generally relax and have a good time. Interaction takes place in a friendly world with parks, shops, dance clubs, and many other virtual places. TinyTIM - It's not just a game, it's a really, really big game.