Last week some friends and I hopped on to play a few games of Sentinels of the Multiverse online.  They talked me into using a Discord server they have setup, which I had never used before.  While I can appreciate the whole "operates in a browser" concept, that failed horribly for me.  However, I installed the App, logged in, and was quite impressed.  Chat, voice, push-to-talk, and a whole slew of really nice features right away.  Well, and a slew of annoying things, like convincing it to not run all the time, to actually log out and close, and so on.  It's currently a love-hate relationship, but much like other programs in the past, once a user overcomes the quirk, it seems like a great tool.  We shall see how it works out.