For laptop schools, the cost of software becomes an important issue. One lab pack is a far different cost as apposed to ever student having access to all software. Below are web sites and organizations that are supporting the 'Open' movement. There are a considerable number of resources available.
The
Case for Open Source
http://www.techlearning.com/shared/printableArticle.php?articleID=196604245
Recommendations - PC World http://www.pcworld.com/printable/article/id,130045/printable.html
Open
Source Victoria- 80 page book (PDF) of free software
www.osv.org.au/index.cgi?tid=155
Education_FOSS_catalog.pdf