Apple MPW is a comprehensive collection of development tools designed for professional Mac OS software developers. It provides a configurable and scriptable environment for creating software for 68K and Power Macintosh systems. Apple MPW includes features for C, C++, and assembly-language programming, as well as a general-purpose C/C++ development environment.
The OpenGL Development Kit provides all the tools needed to start creating OpenGL applications on Mac.
The MBS plugin adds 1500 classes and 29,000 documented functions to REALbasic.