Feather Icons - Simply beautiful open source icons
OpenToonz - OpenToonz is an animation program that is a free software version of Toonz, the animation software...
IconStore - Free icon packs by first-class designers
Synfig Studio - Just another WordPress site
Fluent Icons by Icons8 - Colorful and stylish icons for your projects
Blender - Blender is the open source, cross platform suite of tools for 3D creation.