My first guess/initial I.D. would be jade plant.

which needs much more light

Argh, I know I've seen these before and now I can't recall the name!! I'll edit this comment if I get lucky and remember.

I agree that it needs more sun. Is there a south facing window it can sit by?

Thanks guys, I've moved it to a sunny windowsill! Its getting pretty tall and I'm thinking about repotting it.

Sage, does that container have drainage holes? It looks like a jar.