The OMDOC Distribution
The primary means of getting OMDoc (and keeping up with it) is via its Subversion repository https://svn.omdoc.org.
Read access is directly available on the web using a standard web browser. The repository can even be directly mounted on some operating systems. For write access please contact m.kohlhase at jacobs-university dot de
For a while now OMDoc development will continue on the omdoc1.2 branch until tools and resources have stabilized.