X Steps Recorder - A clone of Microsoft's Problem Steps Recorder, but for linux.
ShareX - ShareX is a free and open source program that lets you capture or record any area of your screen...
Folge - The fastest tool for creating step-by-step guides.
Greenshot - Greenshot is a free and open source screenshot tool that allows annotation and highlighting using the built-in image editor.
ScreenSteps - IT Training Docs For Your Cloud Implementation. Use ScreenSteps when your company implements new cloud technology and you need training docs
LightShot - The fastest way to take a customizable screenshot.