SimpleScreenRecorder - SimpleScreenRecorder is a Linux screen recorder that supports X11 and OpenGL.
Greenshot - Greenshot is a free and open source screenshot tool that allows annotation and highlighting using the built-in image editor.
Camtasia - Camtasia 2018 makes it easy to record your screen and create polished, professional-looking videos.
Shutter - Shutter is a feature-rich screenshot program.
OBS Studio - Free and open source software for video recording and live streaming for Mac, Windows and Linux.
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