Interesting article posted here. I've listed some of the most popular below. To find out about those not listed here (Redis, REVENDB, Riak, Perst, Voldemort, Terrastore, NeoDatis, MyOODB, OrientDB, InfoGrid, DB4objects), read the original article. Source for picture: 21 NoSQL databases (must read) Open Source NoSQL Databases MongoDB - This highly scalable and agile NoSQL database is a amazing p…