vFabric SQLFire by Roberto Zicari · Published January 1, 2012 · Updated February 16, 2014 free trial download (LINK)
Memcached January 1, 2011 by Roberto Zicari · Published January 1, 2011 · Last modified February 16, 2014
InterSystems (Globals) January 1, 2012 by Roberto Zicari · Published January 1, 2012 · Last modified February 16, 2014
db4o as Storage Provider in Voldemort September 1, 2010 by Roberto Zicari · Published September 1, 2010 · Last modified February 16, 2014