CONV. - Convert YouTube video to MP3, GIF or MP4
Viz4D - Viz4D helps you create top-performing web-based 3D viewer that works great on mobile and VR. It is tailored for real-time Archviz walkthrough, 3D product configurator and presentation.
Softorino YouTube Converter - Download YouTube video & audio. Watch and listen offline
Sketchfab VR - Explore countless user creations from Sketchfab in virtual reality.
You-Get - Command-line utility to download media contents from the web
Sketchfab - Sketchfab is an industrial design software tool is useful for ideation and for beginners in the industrial design field.