Software to organize, edit and share your photos (PC and Mac)
http://picasa.google.com/
Free security software for Windows:
http://www.microsoft.com/en-us/security_essentials/default.aspx
Note: Uninstall Norton, McAfee, AVG, Avast or any other antivirus before installing Microsoft Security Essentials. You should only have one antivirus software.
Free security software for Mac OS:
http://www.sophos.com/en-us/products/free-tools/sophos-antivirus-for-mac-home-edition.aspx
Note: Uninstall any other antivirus software before installing Sophos. You should only have one antivirus software.
Open Source Windows - Free Windows software, all open-source, Open Source Windows is a simple list of the best free and open source software for Windows.
http://www.opensourcewindows.org/
From Mark Mehall:
For the "Best Free Mac Software" tab, I suggest using this link to PCMag.com 2010 list of 73 free Mac programs:
http://www.pcmag.com/article2/0,2817,2369639,00.asp
Also check out the "Finding Free Software" file in the Meeting Presentations area.