Artwork Scraper 'ONLY' [software] ?

I know EMM can do this as well as other software, but just wondering if there are any software dedicated to only artwork.
Looking for something lightweight that will scrape for hi-res images.
I already used EMM for my NFO files but chose to not scrape images since I had to go through nearly 3tb of video and was just wanting XBMC to see correct movie info for the time being. Now I need good artwork.