Substance Painter is owned by Adobe, and is the professional standard when it comes to texturing 3D models. It has loads of smart features like being able to paint in 3D in real time, use smart materials, textures and masks that adjust to any object, and export out to all major game engines.
Substance painter comes with a free trial so you can try it out. After that you need to sign up for an Adobe Creative Cloud subscription.
- Find some official tutorials about many aspects of Substance Painter
- Watch a beginners Substance Painter tutorial video by JL Mussi
- Get the tool here.