When I tried using OBS just to make a video of a game, it was laggy and had many dropped frames. It was hard to use and I couldn't figure out how to stop the lagging. Whereas, the Xbox Game bar was way simpler and the clip had no dropped frames or lag. I prefer to use Xbox Game Bar nowadays. Sometimes I go back to OBS and try it again to see it was a bug and had been patched but I had no success.
Overwolf - Overwolf adds epic overlay apps to your favorite games.
OBS Studio - Free and open source software for video recording and live streaming for Mac, Windows and Linux.
RaidCall - Free & Light. Setting up is fast and easy; with no need to rent or set up servers. Low CPU usage and minimum memory footprint allows for smooth, uninterrupted communication. im. Group Communication.
Nvidia ShadowPlay - ShadowPlay
GSC - With GSC, you can pick from any of 14 worldwide datacenters to host your own free voice server.
VokoscreenNG - VokscreenNG is a user friendly screencaster for Linux and Windows.