Sonar is a web application and a runner (Maven, Ant or Java standalone runner) using both a database. This means that most Sonar users interact with Sonar through web browsers from any computer.
Bundled with Sonar but supported for evaluation use only. Although using the Derby database gives access to a fully functional version, upgrades are disabled. Therefore, before deploying to a production environment, we strongly recommend that you use an enterprise database.
2005 with bundled jTDS 1.2 Express Editions are supported 2008 not supported but successfully tested by end-users Collation must be case-sensitive (CS) and accent-sensitive (AS)
IE6 is supported except for management of reviews IE7 IE8 IE9 is fully supported from version 2.12 onwards.
Mozilla Firefox
All versions
Google Chrome
Latest stable version supported Tested with 12
Opera
Not tested
Safari
Latest stable version supported
Notes :
The Sonar web server requires at least 500Mb of RAM to run efficiently.
In terms of data space and as an indication, on Nemo the public instance of Sonar, 4Go of data space are used to analyze more than 6 million LOC with an history of 2 years. For every 1'000 LOC to analyze the database stores 600 Ko of data space. Nemo is currently running on a Amazon EC2 small instance.
To get the full experience Sonar has to offer, you should enable Javascript in your browser.
1.5 
1.7 not tested and there is a user, who reported about possible problem - 
