C++
From Just Solve the File Format Problem
C++ began as a pre-processor for C, and eventually evolved into a programming language in its own right, adding object-oriented classes to a basic syntax still derived from C. It has achieved a great deal of popularity, and has been standardized as ISO/IEC 14882:2003.
The name refers to the "increment" operator ++ applied to C, and is not the grade the language's creator received for it as a student project!
C# and Objective-C are other descendants of C which take different approaches to adding object-oriented classes.