By popular acclaim through our polls... C!! (*).
C is a procedural programming language. It was initially developed by Dennis Ritchie as a system programming language to write operating system. The main features of C language include low-level access to memory, simple set of keywords, and clean style, these features make C language suitable for system programming like operating system or compiler development.
The C donations go to GNU-GCC.
(*) - Link courtesy of GeeksforGeeks.
For each item you purchase, we donate part of our profits to C. This way we all win :)