The source code for tuxmath (and tuxtype) is maintained in Subversion at svn.debian.org -
http://svn.debian.org/wsvn/tux4kids/tuxmath
svn://svn.debian.org/tux4kids/
Anonymous browsing and checkout available (more details to be posted at some point).
If you are interested in becoming a developer, get an Alioth guest account and contact us through tuxmath-devel@sourceforge.net.
David Bruce
