Sonar enables you to collect, analyze, and report metrics on source code. Sonar not only offers consolidated reporting on and across projects throughout time, but a central place to manage code quality. With no complex infrastructure, Sonar fulfills needs in terms of code quality, whether it is to make an audit or implement a continuous improvement process.
Squale (Software QUALity Enhancement) provides models and associated tools to assess software quality and help improve it over time. Its models and tools know how to aggregate raw quality information (such as metrics) given by third party technologies into high-level factors, offer dashboards which present those factors and allow digging deeply into the code quality, show the evolution of quality over time, and give economical indicators about the return on investment of quality efforts.