I have been developing a tool box these last couple months now ! So here's a little showcase.
It includes various tools for rigging such as : easy renaming for batch of objects, coloring by side pattern, matrices tools (constraint, remove constraints network, add offset to matrix, …) , joint insertion, controls creation, mirroring, with different offset types, and easy lock/unlock of transforms attributes.
I am the most proud of the flexible controllers library, where any shape can be made into a shortcut, compatible with my other tools.
My next step is making ribbon tools (creation, surface ribbon, adding controls, ...)
Tool Demo