i mainly use bit torrent to get my downloads. Bit tornado has been my favorite thing to get them. uses the least amt of resources of any of the programs ive tried. Bearshare is the other main thing i use besides bit torrent.
pm me your email address. It was still available on the internet like a year ago which was the last time i checked but you had to pay to get it. I have the .exe file for it still from when it was free though.