http://en.wikipedia.org/wiki/List_of_content_management_systems#File_.2F_Flat_file_2
http://www.clouddbpedia.com
http://nosql-database.org
http://en.wikipedia.org/wiki/NoSQL
http://hypertable.org http://package.hypertable.org
http://www.zodb.org
http://code.google.com/p/tungsten-replicator
http://www.infoworld.com/article/2848722/nosql/mongodb-cassandra-hbase-three-nosql-databases-to-watch.html
http://www.informationweek.com/software/information-management/nosql-databases-an-enterprise-necessity/d/d-id/1326724
http://www.infoworld.com/slideshow/65089/bossie-awards-2012-the-best-open-source-databases-202354
http://blog.nahurst.com/visual-guide-to-nosql-systems
http://www.bitweaver.org/wiki/DatabaseComparison
http://phplens.com/adodb/supported.databases.html
http://www.sqlite.org/cvstrac/wiki?p=SqliteVersusFirebird
http://en.wikipedia.org/wiki/Comparison_of_relational_database_management_systems
http://www.informit.com/articles/article.aspx?p=472693&seqNum=3