Jasmine is an object-oriented database codeveloped by Fujitsu and Computer Associates.
Free evaluation versions are available from http://www.cai.com/products/jasmine.htm
Some hints and tips:
Rather than thinking "I want to persist my objects", an easier way is to think "database" but "relational" has been replaced by "object-oriented".
Methods execute on the server.
[CategorySoftwareTool, CategoryDatabase, ObjectOrientedDatabase]