Open ModelSphere was a data, process and UML modeling tool[1] written in Java and distributed as free software under the GPL License.
[2] Open ModelSphere has SILVERRUN PerfectO for an ancestor, proprietary software developed by Computer Systems Advisers and released in 1996.
With the addition of relational data modeling, the product was renamed to SILVERRUN ModelSphere and released in 2002.
In September 2008, Grandite released ModelSphere's core application as an open source product based on the GNU General Public License version 3.
[5] An empty project is hosted on SourceForge which was registered on Sep 16th, 2008 and last updated on Mar 27th, 2013.