mirrors skinCluster, Geometry and more - based on the edge flow of the polygon object. This means, the character could even be in a different pose for the plugin to still work. It also contains commands for easily creating other mirror tools
Fxfx Maya Real Studio 2 is a useful Mel Script to create realistic scenes in just few clicks. You can render your model as realistic render in seconds.
This tool allow you to easily rig a machanical spider leg with both Ik and Fk systems; The rotations of joints in the leg appens so they can only rotate on their bending axis leaving the twisting and side2side rotation to the upper joint of the hierarchy. In this way the parented geometry will not break during the leg movements.