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The leading provider of test coverage analytics. Ensure that all your new code is fully covered, and see coverage trends emerge. Works with most CI services. Always free for open source.

Codacy | The easiest way to ensure your team is writing high quality code. It's a static analysis tool designed to analyze more than 40 languages such as Javascript, Python, Java, Ruby, and PHP.

SonarQube™ software (previously known as “Sonar”) is an open source project hosted at Codehaus. Down...