itch.io

Uses two-dimensional "sprites", 2D images created and used on a flat plane, as opposed to the three-dimensional models or environments found in 3D games.

Graphics for creating characters

Godot Engine - The free and open source 2D and 3D game engine

Sprites are generally 2D images used in games to represent objects. They can be animated or static, and come in different styles like isometric or top-down.