Allegorithmic Substance Painter

For those who are interested in the process of texture creation this is a must-have software. Substance painter is a very powerful tool for creating high quality textures. Today, over 85% of AAA game studios use Substance in their production pipelines, making Substance the industry standard for PBR (physically-based rendering) material authoring. Substance is quickly spreading to the fields of VFX and animation, design and architecture, allowing a growing number of artists and designers to harness the power of rapid, efficient texturing and material authoring.

Substance is revolving around 3 major software components:  Substance Painter, Substance Designer and Substance B2M (bitmap to material). Check their website to learn more.

They offer a few tutorials directly on their website. You can find them here.