Tom Hoffman has an interesting post about free software being highlighted at NECC.
All of the projects he mentions are worth checking out if you are not familiar with them:
K12LTSP
SchoolTool
Cando
Edubuntu
A good listing of K-12 Open Source projects is the Edu Educational Application Index, maintained in conjunction with SchoolForge. If anyone is aware of a site like Freshmeat where you can sort these projects by language, maturity, etc. let me know. Because nothing is worse than finding a project that would meet your need exactly, only to find out it’s written in COBOL and in early alpha development.
“Highlight” is a bit of an exaggeration. We didn’t do nearly enough this year to highlight free software. We’ll do better next year.