itch.io

Sprite and Texture Painter similar to Substance Painter, just for pixel art.

Interactive volumetric toolkit to quickly sculpt your assets in Unity!

Simple normal map generator for 2D sprites!

Procedural Texture Generation

Procedural textures authoring tool

A Blender add-on for building tile based low-poly scenes with paint/map editor like tools

Paint of Persia is a rotoscoping pixel-art tool

A free, easy to use tool for creating music!