Tools you probably need - likeproblem/RestockRecolour GitHub Wiki

External Tools:

Python, used for built in config maker
Paint.net, for coloring(also used to save _PROJECT files)
Blender, for veryfing what is what in texture file, https://forum.kerbalspaceprogram.com/topic/225485-112x-recolour-collection/?do=findComment&comment=4424769
Github Desktop, just silly gui for git, useful for checking what you changed, pushing etc
Notepad++, I hope you know what is it, anyways it has good utilities and coloring, also fixes weird tabs
CKAN for mods, what you thought?
https://text-compare.com/ - I use this website to make sure all parts are in order etc, each one in correct category
https://www.messletters.com/en/big-text/ - text creator I use for category names