Hey lookin' for some feedback here. - A Tyrannosaur rig with Maya MuscleSystem - For sale at joel3d.com for $150 (seems a fair price, no?)
Here are some features.
Attribute to switch between Maya Muscle and traditional Maya skin cluster.
Easy to select FKcontrols for muscles for adjusting individual jiggle/weight attributes on muscles splines.
IKFK blend (Arms, legs and tail)
Symmetrically mirrored controls
Stretchy (Back, neck, arms, legs and tailRibbon spline for tail
Scalable (including muscle and skin)
Joint based facial set-up (WIP) includes fleshy eyes, tongue, nose and lips.
Switch between round, or cat like iris both with open/close blendshape.
Includes skeleton and skin geometry.
New updates coming soon! (Last update was 01/21/2015)