The Free Mac Classroom
http://web.mac.com/simon_elliott/iWeb/simon_elliott%40mac.com/Software.html

Open Source Mac
http://www.opensourcemac.org/


Software for Starving Students
http://softwarefor.org/


Free Open Source Software Mac User Group
http://www.freesmug.org/


Open Source Mac
http://nothickmanuals.info/doku.php?id=opensourcemac


National Center for Open Source and Education
http://www.ncose.org


A book on Free and Open Source Software can be downloaded from the URL below as a PDF:
http://www.osv.org.au/index.cgi?tid=15


Portable Apps for PC
http://portableapps.com/

Portable Apps for Mac
http://www.freesmug.org/portableapps/

Software for Starving Students
http://www.softwarefor.org/

The Free Mac Classroom
http://web.mac.com/simon_elliott/iWeb/simon_elliott%40mac.com/Software.html

Open Source Windows
http://www.opensourcewindows.org/

Open Source Mac: A Simple list of free, open-source software for Mac OSX
http://www.opensourcemac.org/

Cool OSX Apps
http://www.coolosxapps.net/

Tucows - OSX
http://www.tucows.com/Macintosh/

Macintosh Software - Impressive Mac Applications

Free Technology for Teachers
http://freetech4teachers.blogspot.com/

Free Mac Software Classroom
http://www.iskysoft.com/article/all-free-mac-software.html