X Steps Recorder - A clone of Microsoft's Problem Steps Recorder, but for linux.
UserGuiding - User onboarding made easy, for less. Create product walkthroughs in a couple of clicks, without breaking the bank.
Folge - The fastest tool for creating step-by-step guides.
Usetiful - Fight user churn with great user onboarding. Interactive product tours and smart tips significantly improve your user retention.
Snagit - Screen Capture Software for Windows and Mac
Userlane - Digital adoption platform with interactive guidance for software applications allowing anyone to understand and master any software from the get-go.