nanoCAD - nanoCAD is a pro-grade 2D CAD system with native DWG support and full customizability.
UserGuiding - User onboarding made easy, for less. Create product walkthroughs in a couple of clicks, without breaking the bank.
KiCad - A Cross Platform and Open Source Electronics Design Automation Suite
Usetiful - Fight user churn with great user onboarding. Interactive product tours and smart tips significantly improve your user retention.
OpenSCAD - OpenSCAD is a software for creating solid 3D CAD objects.
Userlane - Digital adoption platform with interactive guidance for software applications allowing anyone to understand and master any software from the get-go.