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.
cobertura - A code coverage tool for java
Istanbul - Code Coverage Tool - Istanbul is an all-javascript instrumentation library that tracks statement, branch, and function coverage.
EclEmma - EclEmma is a free Java code coverage tool for Eclipse, available under the Eclipse Public License.
Codecov - Develop healthier code using Codecov's leading, dedicated code coverage solution. Try it free
OpenCover - OpenCover is a code coverage tool for .NET