Tools
List of neat art programs, tools, and references I've discovered.
Tool for managing reference images.
Tool for organizing and viewing reference images. Similar to Kuadro.
A neat little program to build 3D scenes with 2D tiles.
Inspired by and similar to Crocotile 3D. An add-on for Blender.
Animal Photo Art References Search
A very neat tool to use to find animal references created by x6udpngx.
A site dedicated to pixel art. Full of art resources and tools.