PMD - PMD is a source code analyzer. It finds common programming flaws like unused variables, empty catch blocks, unnecessary object creation, and so forth. It supports Java, JavaScript, XML, XSL. Available Plugins include: Maven PMD. Eclipse. NetBeans. JBuilder. JDeveloper. IntelliJ IDEA. PMD additionally includes CPD, the copy-paste-detector. CPD finds duplicated code in Java, C, C, C#, PHP, Ruby, Fortran, JavaScript, PLSQL, Apache Velocity, Scala, Objective C, Matlab, Python, Go.