M10P9 - alternative litters

I have 2 cats and am looking for a better litter. Even the non- or low- tracking litters stick to my kitties' paws and gets everywhere! I have litter mats, too, but still... Litter is everywhere. Plus I'd love a better odor absorber that doesn't rely on heavy scents. Cats don't like strong smells so I'm not buying perfumed litters.

Anyway, I've read about some alternative litters made out of pine pellet, walnut shells, and even corn. Does anyone use anything like this or know of others?