A client for the ModuleRepository, this module allows previewing, and installing modules from remote sites without the need for FTP'ing, or unzipping archives. Module XML files are downloaded using SOAP, integrity verified, and then expanded automatically.
In short, this means that you can download and install modules directly from the Admin Panel. Any module that has been released as an XML file can be downloaded and installed. Go to Extensions/Module Manager in the Admin Panel to see the list of modules from the official CMSMS repository in the CMSMS Development Forge.