From Schemalet Wiki

Class Diagrams

• XGAP - http://www.xgap.org/objectmodel.html
• FuGE 1.1 - http://fuge.sourceforge.net/
• MaGE 1.1 - http://www.mged.org/mage-tab/
• PaGE 1.2 - http://www.pageom.org/