Coveralls

Code coverage history and tracking

Coveralls helps developers deliver better code. Line-by-line test coverage reports and statistics gives engineering teams insight to spot gaps where bugs may be hiding. Your team can get notified by a number of methods when newly deployed code changes coverage. Add a Coveralls coverage badge to your projects' readme on Github and show off your test coverage. It's the best way to let everyone know your software has a complete test suite. Coveralls is always free for open-source projects.