IbisPaint (free/paid)

I use this program to create textures/drawings for my websites/games, there is also IbisPaint X, which is only for Android and IOS, i use the PC version, which is paid (although there is a 1-hour trial)

GDevelop (free)

This is my main game engine, i made there quite alot of games. GDevelop supports both 3D and 2D, though i more recommend it using for 2D games.