Currently SOFA 2 consists of two packages: SOFA 2 itself and Cushion, which is a command-line tool for developing SOFA 2 components. Both of them are available from the SOFA 2 Forge.
For controlling SOFA 2 application Management Console is provided. It is available from the SOFA 2 Forge.
Source code of the SOFA 2 can obtained from the SVN repository.
SOFA 2 update site
SOFA IDE and MConsole can be installed via SOFA 2 update site located at http://sofa2.ow.org/update-site.