draw.io - Online diagramming application
OBS Studio - Free and open source software for video recording and live streaming for Mac, Windows and Linux.
LucidChart - LucidChart is the missing link in online productivity suites. LucidChart allows users to create, collaborate on, and publish attractive flowcharts and other diagrams from a web browser.
Snagit - Screen Capture Software for Windows and Mac
PlantUML - PlantUML is an open-source tool that uses simple textual descriptions to draw UML diagrams.
ShareX - ShareX is a free and open source program that lets you capture or record any area of your screen...