There's a program called Discord. It lightweight, free, doesn't appear to have any ads, and seems to basically be what XFire should've been.
-You can create a server for a group, under which users can be assigned any permission settings, including allowing multiple admins.
-You can run multiple rooms, both text and voice, and they'll be under the same general side icon. These can also be sub-controlled, so if we need say... a more private room for strategizing as opposed to a public one that gets posted everywhere and is fully publicly accessible we can do that. It also allows to us split off general chat and RP, for those who are looking for one and not the other, or simply want them on separate logs. Rooms can be freely made and deleted, so if we need say... a temp room for one battle in one game, create, use, poof.
-It appears to support both the "Here's who's playing what" and the ability to run via overlay inside a game - the two main things that made XFire famous in the first place.
-It has a downloadable desktop client, downloadable phone client, and an in-browser version for when you're somewhere you don't want to or can't downloading.
-It puts everything into one icon, so you click the CC icon and there's all of our current rooms. No need to play the "where did that Skype room I haven't touched in a few days go" game?
-So far, I haven't seen any ridiculous start-up times, random crashes, rooms disappearing/renaming/changing owner for no good reason, random errors, or any of the many, many issues XFire had.
If you'd like to try it out, here's the site:https://discordapp.com/
Here's the quick overview of what it does (including what it does that Skype won't):https://discordapp.com/features