If you want freebies welllllll,as always scan for virus in the file prior to opening.
http://www.caedes.net/ = wallpapers of high quality no viruses etc to worry about
http://www.freewareplanet.net/
http://www.freewarefiles.com/
http://www.techsupportalert.com/best_46_free_utilities.htm
OK your gunna like this one me thinks,i use it heaps,it's a toolbar that you configure to search what you want,select say software,clik the stumble button and it will take you to site after site etc,there is no spyware etc in the toolbar so relax,for more info just google you'll find it gets a good rating
http://www.stumbleupon.com/
EDIT: Arghhhh crap i keep forgetting this site does'nt auto link grrrrrr ,ok anyway before ever you decide to pay for any software search for it 9 times outta 10 there's a freebie somewhere,tho i've yet to find a free ObjectDesktop..lol..