Audacity

http://audacity.sourceforge.net/

Classroom used for Audacity http://amyboehman.wordpress.com/2007/06/19/classroom-uses-for-audacity/

http://www.slideshare.net/lisashusband/audacity-and-photo-story-in-the-classroom/

http://teachingtechie.typepad.com/learning/2005/07/using_audacity_.html