This plugin creates a base-mesh creation process using mirrored metaballs, loosely based in the zSpheres workflow: It has a character library including dinosaurs, insects, humanoids and even Cthulhu.
NEW! 2.80 VERSION AND 4 NEW CHARACTERS: GORILLA, PTERODACTYL, PEGASUS AND CENTAUR!
The resulting object can be an array of metaballs or a polygonal base mesh.
Download here: Metacharacter Maker