Libre office draw is wonderful, it can edit pdf docs at ease. It’s crazly powerful compared to paint 3d
draw.io - Online diagramming application
Glambase - The Glambase platform provides the ability and the tools to create, promote, and monetize AI-powered virtual influencers.
yEd - yEd is a free desktop application to quickly create, import, edit, and automatically arrange diagrams. It runs on Windows, Mac OS X, and Unix/Linux.
alomoves - Video-based fitness training from the world's top coaches
PlantUML - PlantUML is an open-source tool that uses simple textual descriptions to draw UML diagrams.
Monica - Monica is an open-source personal CRM to keep track of your friends and family.