The Free60 git repository was hosted by sourceforge - it switched to github recently. You can download the latest source with the following commands
LibXenon
git clone <git://github.com/Free60Project/libxenon.git>
XeLL
git clone <git://github.com/Free60Project/xell.git>
For other repositories take a look at the webinterface of github: https://github.com/Free60Project
For LibXenon projects - check out the appropriate Github organization: https://github.com/LibxenonProject