Postgresql

https://storm.canonical.com/ O/R mapping framework from Canonical LTD – Ubuntu Parent Company

http://blogs.sun.com/jkshah/

http://www.spec.org/jAppServer2004/results/res2007q3/jAppServer2004-20070606-00065.txt PostgreSQL spec performance test, compared to oracle. With full hardware specs and comments on tuning solaris and postgres

http://www.postgresql.org/docs/techdocs.17 returning multiple rows from a function in postgresql

http://www.postgresql.org/docs/techdocs.2 collection of contributed articles on PostgresSQL

http://www.postgresql.org/docs/techdocs.7 example on how to implement row-level protection in PostgreSQL

http://www.powerpostgresql.com/PerfList/ some notes on postgresql performance tuning

http://www.onlamp.com/pub/a/onlamp/2005/03/17/slony_changes.html

http://www.onlamp.com/pub/a/onlamp/2004/11/18/slony.html