SONAR is an open source quality management platform, dedicated to continuously analyze and measure technical quality, from the project portfolio to the class method.
It is a web application and a maven plugin, meaning most users interact with it through web browsers from any computer.
Using Sonar throughout the whole development project life cycle drastically improves visibility for every stakeholder. This gained visibility allows to manage risks, reduce maintenance costs and improve agility by implementing a real quality first approach.
Sonar enables navigation through the latest measures to enable thorough analysis, to increase quality. But not only that, Sonar keeps historical data in order to see the evolution of measures throughout time.
SONAR leverages the existing ecosystem of quality open source tools (ex. Checkstyle, PMD, Maven, Cobertura …), to offer a fully integrated solution to development environments and continuous integration tools.
It also has a Hudson plugin available.