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This is the Quartz Framework project ("quartzlib")
This project is hosted by SourceForge.net. The project team describes it as:
Quartz Framework is an application framework for developing rich and highly-integrated Java applications that will run on any operating system that supports Java, including Quartz OS, OS X, Linux, and Windows. Quartz Framework is the standard framework for developing applications for Quartz OS, and is use for all the applications included with Quartz OS. This means that applications developed with the framework look and work the same as the standard built-in applications.
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