Snapfiles gives users pure software without the addons. I think they test for viruses too because I have never downloaded anything nasty from here.
This site is filled with viruses. Everything you download can cause a virus infection on your system. Download from other sites that don't install with download managers.
Microsoft is a very complicated company but their web site is safe. You should not expect viruses or malware from this site.
LO4d.com is a safe site with useful information about software -- good and bad. Follow the instructions and you're in the clear.
Unlike download.com and company, this site tests software and doesn't force you to install toolbars and viruses.
I don't trust this site at all. All downloads have malware attached to them. Even if you follow the install directions carefully and deny installing extras you will still end up with malware.
AVOID AT ALL COSTS!