Add RefactorFirst (akullpp#1054)

README.md

@@ -166,6 +166,7 @@ _Tools that provide metrics and quality measurements._
 - [NullAway](https://github.com/uber/NullAway) - Eliminates NullPointerExceptions with low build-time overhead.
 - [PMD](https://github.com/pmd/pmd) - Source code analysis for finding bad coding practices.
 - [p3c](https://github.com/alibaba/p3c) - Provides Alibaba's coding guidelines for PMD, IDEA and Eclipse.
+- [RefactorFirst](https://github.com/jimbethancourt/RefactorFirst) - Identifies and prioritizes God Classes and Highly Coupled classes.
 - [SonarJava](https://github.com/SonarSource/sonar-java) - Static analyzer for SonarQube & SonarLint. (LGPL-3.0-only)
 - [Spoon](https://github.com/INRIA/spoon) - Library for analyzing and transforming Java source code.
 - [Spotbugs](https://github.com/spotbugs/spotbugs) - Static analysis of bytecode to find potential bugs. (LGPL-2.1-only)