This article is from the Mac Programming FAQ, by Jon Watte firstname.lastname@example.org with numerous contributions by others.
The C++ Standard Template Library (STL) compiles under Symantec C++
and CodeWarrior, and versions are available for both.
PowerPlant is the Metrowerks CodeWarrior offering; it's written by the
guy who designed the Think Class Library, but it has a lot of
differences from the original TCL; for one, it's not a monolithic one
base class framework. On the other hand, it has some catching up to do
before it reaches the level of MacApp. It is gaining quite fast on TCL,
but isn't all there yet. It has the most complete support for
AppleEvents & scripting & drag & drop other modern features.