The OpenMx website will be down for maintenance from 9 AM EDT on Tuesday, September 17th, and is expected to return by the end of the day on Wednesday, September 18th. During this period, the backend will be updated and the website will get a refreshed look.
There are three types of documentation available for OpenMx, an Official User's Guide, an Official Reference Manual, and the OpenSem Wiki. The two Official documents are maintained by the OpenMx development team. The Wiki is a community document that can be contributed to and edited by anyone registered on the OpenMx web site.