Been using mushclient for almost 20 years now and its got pretty much everything. Colors, spawns, clickable https links, force create links if it didn't populate correctly. I think the spawn nestings are garbage (they just come up as notepad windows inside the client and you use ctrl+1 if it is world one or ctrl+2 etc to cycle thru main window and spawn windows), it has a simplistic scripting language that made learning macro coding fairly easy and there is a MUD named CLOK that I was able to fully automate two different professions using triggers/macros, and a single macro would switch my character between the two professions (and yes this is legal in that game, but you can't be afk so if an admin gets ahold of you and you dont respond within a few minutes you getsa temp ban)