FOSS Education Apps Suggestions?

[Bryant Patten]

I am updating the Free Software for Schools publication (www.lulu.com/ 
content/286873) for the upcoming NELS/FOSSED conferences  
(www.fossed.com) and I thought before I put the final wraps on, I  
would ask the people on this list for their top recommendations.  The  
current version has about 140 programs listed and the most famous  
ones are already included:  Open Office, Abiword, all the edu.kde.org  
apps, GIMP, Scribus, Audacity, Blender, Inkscape, MythTV, Celestia,  
Stellarium, NVU, Drupal, Moodle, Tuxpaint and Tuxtype, GCompris....etc

But some other applications are not in this 2+ year-old publication:  
Scratch, Alice, OpenBiblio, Koha, Dia, Thunderbird, Firefox,  
Freemind, DansGuardian, Nagios, Zimbra...and ???

So I am curious what others people think should be included.  Your  
suggestions may already be in there but I would hate to miss a new,  
cool program or perhaps a classic that I just overlooked.

Bryant Patten