The below software is offered by the developers at no cost for general use.

Blender - 3D modeling and rendering
Cura - 3D printer slicing software with limited modeling capabilities
Handbrake - Video encoder and disc ripper

Notepad++ - Robust text editor
VS Code - Comprehensive IDE supporting most major languages

Audacity - Audio editor
OBS Studio - Video streaming and broadcasting
VLC - Media player with support for most video/audio codecs