Custom Tools that I've created:

-Null group over objects that take their Translate/Rotate/Scale values and reset the object's values to zero
-Attach a hair follicle to any two edges
-Snaps Translate/Rotate values from an object to another
-Renames and Orients Bones and creates FK controls for an arm, adapts to any chain length
 -Renames and Orients Bones, creates IK controls and Foot Roll attributes for a leg. Includes Pole Vector, Global Scale and Stretch when the leg goes beyond her rest length
-Mirrors Blendshapes from left to right even on an unsymetrical mesh
-Creates an object (either Joint, Locator or Nurbs Circle oriented in either X Y or Z), works for transform objects but components too and lets you pick the name of the created object
-Changes size of any Nurbs object using Control Vertex so that their isn't any values left in scale
-Changes any object's shape color to either red blue yellow or green (I usually never needed other colors)