What software could you recommend for animated 3D math sketches? 

Sir, you are awesome, thanks a lot for your clean and deeply precise animation!
Could you recommend some tools for creating animated math sketches like yours? I realize that it depends. 
 3dsMax, Maya, Blender seem to be overhead,
 CLUCalc is nice, but raster,
 to write custom scripts for SVG/pgf/TikZ is to reinvent a wheel.