Discord is used a lot for text-based chat, but it's also a pretty nifty tool for voice chat, whether you're gaming, teleconferencing, or just want to talk to your friends.
Discord is a very popular, cross-platform communication tool, in part because it's free to use, and just about anyone can create a server. A lot of it is text-based chat, but it's also got a pretty solid voice chat feature as well.
Full story from the WindowsCentral blog...