There is a lightweight object oriented extension to C called Objective-C [1] that unfortunately never gained much traction outside the NeXT/Apple ecosystem. The

There is a lightweight object oriented extension to C called Objective-C [1] that unfortunately never gained much traction outside the NeXT/Apple ecosystem. There is also Cello [2]. [1] https://en.wikipedia.org/wiki/Objective-C https://en.wikipedia.org/wiki/Objective-C [2] https://github.com/orangeduck/Cello https://github.com/orangeduck/Cello