After jumping back in the mud in nearly 25 years of not doing it, I have come to the conclusion that best mud client is MUSHclient from http://www.gammon.com.au/mushclient/.

My reason for that is if you are coding you can turn off all the special character codes so that all of your keystrokes can enter the mud. This is only relevant if you code actively online while in the mud.

It also has other nice features but I haven’t bothered with them yet.