SWIG is a compiler that attempts to make it easy to integrate C, C++, or Objective-C code with scripting languages including Perl, Tcl, and Python. In a nutshell, you give it a bunch of ANSI C/C++ declarations and it generates an interface between C and your favorite scripting language. However, this is only scratching the surface of what SWIG can do--some of its more advanced features include automatic documentation generation, module and library management, extensive customization options, and more.