MongoDB seems to be the easiest one to install and to start using. You will get packages ready for most of distributions and the installation is really simple:

MongoDB seems to be the easiest one to install and to start using. You will get packages ready for most of distributions and the installation is really simple: http://www.mongodb.org/display/DOCS/Ubuntu+and+Debian+packages http://www.mongodb.org/display/DOCS/Ubuntu+and+Debian+packag... I can create test database with web frontend just to test and experiment a little - please let me know if you are interested (at beta@ninjaci.com).