In Apple's Quartz Composer, misconfigured patches can eat up memory at an exponential rate, killing your compositions. Or the problem can lurk more subtly, making the compositions jumpy or just slow. Unlike the built-in profiling tools, Performance Inspector performs a patch-by-patch analysis of the performance of your compositions while they're running, providing you with detailed information on which patches, exactly, are slowing your composition down. Technical info and purchase info available from kineme.net, as always.
Kineme3D provides support for 3D models in Quartz Composer.
Not only can you render your models, you can also deform them in various ways. Twisting, Gravity, Scaling, Bend Boxes, and Quantization are a few ways these can take place. You can also blend between two models with the same number of vertices, creating smooth motion for keyframed animation.
To get the technical info or download a trial, visit kineme.net.