SIMO project has now all of its development in version control system. It's accessible from (redundant link removed) either using a web browser or a Subversion client.
Currently the SIMO version control system has three subprojects in it: XML simulator, XML files, and stand simulator developed with J. See the trunk subfolder for each project for the files.
There is no documentation yet, just the codebase under development. Documentation will follow at a later stage.