Krita

(WIP)

Texture Generation, Image Manipulation, Texture Painting, Texture Packing

Open-Source, Free alternative to Photoshop.

Useful Features

Wrap Around Mode : Useful for painting seamless tiling textures and trails [link pages here?]

https://krita.org/en/item/new-wraparound-tool/

Cel-based Traditional Animation : Useful for hand animation and exporting to flipbooks

Can use Slate[Link here?] or following scripts/plugins to generate atlases or flipbooks, https://github.com/Falano/kritaSpritesheetManager

Useful brushes for Game Artists

https://github.com/GDQuest/krita-free-brushes

https://www.youtube.com/playlist?list=PLhqJJNjsQ7KE3FLHIE31UgmLdcqsZfXTw

https://www.gdquest.com/product/krita/brushes/

Links : 

Download

https://krita.org/en/download/krita-desktop/

Documentation

https://docs.krita.org/en/

Community

https://docs.krita.org/en/contributors_manual/community.html

https://www.reddit.com/r/krita/

Website

https://krita.org/en