FreeGameDev

I stumbled on One Lone Coder's PixelGameEngine 2.0. I'm not convinced that it would be better to use that over SDL but maybe some people are interested.

Github: https://github.com/OneLoneCoder/olcPixelGameEngine

This library it's monolithic and based on OpenGL and libPNG, maybe not flexible as SDL.

SDL it is modular and can work out of the box on many systems/devices, and is also widely supported and with a big community of developers/users, maybe it's a better choice in the long term, in my opinion...