IUP

[CandCPlusPlus]

I have not tried IUP with Pelles C but it does look interesting. A cross platform GUI library for C. In theory, it should work with Pelles C but without the cross platform part of IUP. I'll need to update this post, if and when I ever get to testing it. Any thoughts and advice on using it would be welcomed.

https://sourceforge.net/projects/iup/