It is really annoying for free users on rapidshare to download files from rapidshare, as rapidshare does not allow free users to download multiple files.
Rapidshare Download Accelerator (via TechnoSpot.net) allows you to download multiple files form rapidshare for free, without paying money for a premium account.
I have tested this rapidshare downloader with some files it worked in my case when i tried downloading some files simultaneously from rapidshare as a free user.