QCGUI is a macro pack that can add user interface elements to your Quartz Composer patches that allow control your compositions.
The software requires Kineme data tools to be installed for this to work correctly. Of note for Yosemite users Data Tools needs to be compiled to work correctly for Yosemite 10.10. A working download of Data Tools for Ypsemite can be found on the Facebook Quartz Composer group.
This the first release of this software and there may be a few bugs but it appears the developer is addressing issues that need to be fixed.