Popular Open Source download sites:

http://sourceforge.net/

http://download.cnet.com/windows

http://downloads.zdnet.com

http://www.tucows.com/downloads

http://www.freewarefiles.com

http://library.slashdotmedia.com

http://www.vmware.com/download

https://archive.org/details/open_source_software

https://www.openoffice.org/download

http://www.hpl.hp.com/downloads

http://www.downloads.com

http://www.fileparade.com