OverWolf Is Same as "Xbox Game Bar" but it's WAYYYYYYY smoother! It's perfect for low-end-pc so "Xbox" works fine on high-end pcs and "OverWolf" works good on low-end pcs, don't ask me about mid-end pcs lol..
Xbox Game Bar - A customizable gaming overlay built into Windows 10 👾
Greenshot - Greenshot is a free and open source screenshot tool that allows annotation and highlighting using the built-in image editor.
OBS Studio - Free and open source software for video recording and live streaming for Mac, Windows and Linux.
Shutter - Shutter is a feature-rich screenshot program.
Nvidia ShadowPlay - ShadowPlay
Snipping Tool - Use Snipping Tool to capture a screen shot, or snip, of any object on your screen, and then annotate, save, or share the image