MetaModelAgent v4.2.1 is a pure bug-fix release that solves several bugs that have been detected in the last year.
For more info of new features and bug fixes, see the MetaModelAgent website.
For free download, use the Eclipse update site:
http://www.metamodelagent.com/update
When MetaModelAgent have been installed you will be able to register for an evaluation license or request a limited FREE license.