The Selene Engine is an open source realtime 3D engine written in c and c++. It's a light-weight engine with a carefully implemented software renderer. The D3D and OpenGL render subsystems are also included.
GUSI (Grand Unified Socket Interface) is a POSIX/Pthreads/Sockets library bringing some of the comforts of UNIX 98 to traditional MacOS (7.0 - 9.9999).
An actionscript 2.0 unit testing framework for use with with Macromedia Flex. Based on Nunit and other testing frameworks provides full support for testing Flex applications including asynchronous web service requests.
Shuck is a POD (plain old documentation) reader for Mac OS (Classic). It is bundled with (and written for) MacPerl.
WTextView and WText are PowerPlant and C++ wrappers classes for the Worldscript Aware Styled Text Engine (WASTE) version 2.0 and higher. Works with Macintosh OS's 8, 9, & X (Carbon). WASTE is by Marco Piovanelli.
Whisper is C++ application framework for the Mac and Windows. Unlike most frameworks it takes advantage of the standard library, design by contract, and modern C++ idioms.
The AUIT toolkit is a high-level Java user interface toolkit which completely abstracts the application code from the interface. For many platforms, native widgets are provided; other platforms can use Swing. The interface is specified in XML.
The Wizard's Apprentice is an application that allows you to ask questions from a script. It uses Windows dialog boxes in the so-called Wizard style: dialogs asking one question at a time, with a Back button, a Next button and a Cancel button.