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
GLASS a free ODBMS for the Seaside web framework January 1, 2009 by Roberto Zicari · Published January 1, 2009 · Last modified February 16, 2014
The ZooDB Object Database January 23, 2015 by Roberto Zicari · Published January 23, 2015 · Last modified May 17, 2015
OO7J benchmark February 1, 2010 by Roberto Zicari · Published February 1, 2010 · Last modified February 16, 2014