PowerPoint is a simple program to produce your own flashcards or tutorials for your students to use on their iPods or classroom set.
Free Software that you will need:
Photostory3: http://www.microsoft.com/downloads/details.aspx?familyid=92755126-A008-49B3-B3F4-6F33852AF9C1&displaylang=en
Jodix Free iPod Converter (wmv to mp4): http://www.ipod-video-converter.org/free-ipod-video-converter.exe