| Artistic Style | Java Source Code Indentation Filter | 
| Barat | Code Parser/Analyser | 
| CheckStyle | Java Coding Convention Checker | 
| ImportScrubber | Java Import Optimizer | 
| Jacobe | Java Source Code Formatter (not Open Source, but free) | 
| JCSC | Java Coding Style Checker | 
| JRefactory | Java Refactoring Tool | 
| Mozart Development Environment | Framework for user extensible compilers and development tools | 
| PMD | Java source code analyser/checker | 
| QDox | Framework for extracting class/interface/method definitions | 
| Recoder | Source Code Metaprogramming Framework | 
| RevJava | Review assistant for Java programs | 
| Transmogrify | Java Refactoring Tool |