MacZoop was a popular application framework

Application framework

In computer programming, an application framework consists of a software framework used by software developers to implement the standard structure of an application for a specific development environment ....

 for the Apple

Apple Computer

Apple Inc. is an American multinational corporation that designs and markets consumer electronics, computer software, and personal computers. The company's best-known hardware products include the Macintosh line of computers, the iPod, the iPhone and the iPad...

 Macintosh, based on Carbon. Written exclusively in C++

C++

C++ is a statically typed, free-form, multi-paradigm, compiled, general-purpose programming language. It is regarded as an intermediate-level language, as it comprises a combination of both high-level and low-level language features. It was developed by Bjarne Stroustrup starting in 1979 at Bell...

, it was designed as a much smaller and manageable alternative to the popular, but now defunct Think Class Library (TCL) from Symantec

Symantec

Symantec Corporation is the largest maker of security software for computers. The company is headquartered in Mountain View, California, and is a Fortune 500 company and a member of the S&P 500 stock market index.-History:...

, and later, PowerPlant

PowerPlant

PowerPlant is an object-oriented GUI toolkit, application framework and set of class libraries for Mac OS, created by Metrowerks. The framework was fairly popular at the height of the Classic Mac OS era, and was primarily used with CodeWarrior...

 framework from Metrowerks

Metrowerks

Metrowerks was a company that developed software development tools for various desktop, handheld, embedded, and gaming platforms. Its flagship product, CodeWarrior, comprised an IDE, compilers, linkers, debuggers, libraries, and related tools...

. MacZoop was developed continually from 1994 until 2003, and was available free. In the face of continuing development of the Cocoa framework and the Project Builder tools from Apple for Mac OS X

Mac OS X

Mac OS X is a series of Unix-based operating systems and graphical user interfaces developed, marketed, and sold by Apple Inc. Since 2002, has been included with all new Macintosh computer systems...

, proactive MacZoop development was discontinued in 2003, though bugfixes and maintenance releases were still made. The MacZoop domain expired sometime in 2008, though a legacy download is still available: http://apptree.net/code.htm