Googled, couldn’t find any active links.
Caveat: many of the links in MudConnector may be outdated or obsolete, but there’s still plenty of games still running.
I’m not that familiar with CircleMUD, but because it requires active voting to stay ranked, Top Mud Sites is a good place to look. My MUD is still up and running and being actively developed (Ancient Anguish).
Funny, each time I saw your name here coupled with your location, I was fairly certain you were from AA. I’m not active there any more, but I remember it fondly.
Ah, Ancient Anguish. I should see if my lv19 is still active or if it got purged.