Need help identifying a couple of Lego sets, grey tank with 4 short legs, and ship with long wings with lime green tiles Do you recognize either of the below Lego sets?

We received them as a hand-me-down gift with no instructions. 

Thanks for any help!
Top set is number 75013, Umbaran MHC (Mobile Heavy Cannon). I think the previous owner modified the cannon, because the actual set looks vastly different up there. I don't recognize the bottom set, but it looks like some star wars set.