Yes, Savage Worlds is an RPG set. They have a free to download skirmish version I think called 'Showdown'. But we didn't use it. We just used the SW combat resilution and Magic system tempered by our years of gaming together and mutual love of a mini game that tells a fun story.
My understanding is that Showdown is quite good.
I've done very similar scenarios using GW's LotR rules also with good results.