Intern : Intern is a complete test system for JavaScript designed to help you write and run consistent, high-quality test cases for your JavaScript libraries a...
SonarQube : SonarQube is an open source platform for continuous inspection of code quality.
jscs is a code style checker. jscs can check cases, which are not implemented in jshint, but it does not duplicate jshint functionality, so you should use jscs and jshint together.