MayaStylin changes the entire set of UI widgets to themes based on Qt's implementation of CSS style sheets. A "dark" and a "light" style are available with each having various colour options. Although Graph Editor Redux provides access to MayaStylin, the script can be accessed outside of this tool and modified (drive your Pipeline TD crazy :) )
Graph Editor Redux
Graph Editor Redux is a redesign of Maya's curve editor toolset. Not only does it reorganize the classic graph editor functions, it provides new tools that many animators have found extremely helpful in massaging animation performances.
See included PDF documentation for installation and description of features. Graph Editor Redux and Digital Pose Test require the full PyQt4 package. Installation starting with Maya2012 is now different than for previous versions. It now installs (easily) via Maya's module feature. See the PDF for exact instructions.
Note: To switch between Suite, Classic and Redux go to the "View/Toolbar Mode" menu of the Graph Editor toolbar.
Digital Pose Test (or DPT) is a tool that helps with timing/blocking animation. It is patterned after the traditional Exposure Sheet (X-Sheet). Images of keyed poses are captured, manipulated within DPT and then the new timing can be sent back to the scene which updates the original keyframe timing.
Timing ChartStill in beta. Unfortunately, not enough interest in this tool which is patterned after traditional animation principles. 3D trained animators say they are happy with the Graph Editor.