List 3D Software (Freeware/Open Source)

[c-sanchez]

Slate - Pixel Art Editor https://github.com/mitchcurtis/slate
Slate is a bitmap editor available for Linux, Windows and Mac. With Slate, you can: Edit images directly, Use layers, Create seamless 2D tilesets, Preview sprite sheet animations.

Dust3D - A brand new 3D modeling software https://github.com/huxingyi/dust3d
It helps you create a 3D watertight base model in seconds. Use it to speed up your character modeling in game making, 3D printing, and so on.