SonarQube - SonarQube, a core component of the Sonar solution, is an open source, self-managed tool that systematically helps developers and organizations deliver Clean Code.
JaCoCo - JaCoCo is a free Java code coverage library.
Codecov - Develop healthier code using Codecov's leading, dedicated code coverage solution. Try it free
dotCover - JetBrains dotCover is a .NET unit test runner and code coverage tool that integrates with Visual Studio.
cobertura - A code coverage tool for java
SimpleCov - SimpleCov is a code coverage analysis tool for Ruby.