Graphic modeling and animation

This could be better for an addon, anyway…
I would like to do basic mesh manipulation, in both 2d and 3d, like extrude (Blender extrudes, Inkscape does in/out-set), boolean operations (intersection, exclusion, etc), grouping, subdividing, rigging (flash does some kind of 2D rigging)…
And to animate using skeletons (especially in 3D).