PMD
About
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, Salesforce.com Apex and Visualforce, PLSQL, Apache Velocity, XML, XSL.
Additionally it includes CPD, the copy-paste-detector. CPD finds duplicated code in Java, C, C++, C#, Groovy, PHP, Ruby, Fortran, JavaScript, PLSQL, Apache Velocity, Scala, Objective C, Salesforce.com Apex, Perl, Swift, Matlab, Python.
Source and Documentation
Our latest source of PMD can be found on GitHub. Fork us!
The rule designer is developed over at pmd/pmd-designer. Please see its README for developer documentation.
News and Website
More information can be found on our Website and on SourceForge.