McObject by Roberto Zicari · Published January 1, 2009 · Updated February 16, 2014 Download an open source / evaluation copy of the Perst™ embedded database for Java or .NET. LINK
AspOEv: An Aspect Oriented Evolution Framework for ODBMS January 1, 2004 by Roberto Zicari · Published January 1, 2004 · Last modified February 18, 2014
Caché Post-relational Database January 1, 2010 by Roberto Zicari · Published January 1, 2010 · Last modified May 9, 2014
ConceptBase January 1, 2008 by Roberto Zicari · Published January 1, 2008 · Last modified February 16, 2014