Open Source & Free Libraries

ProGuard 3.2 class file shrinker, optimizer, and obfuscator
Java Launchers/EXE Wrappers
- Java Launcher free for education
- JSmooth Java Executable Wrapper that makes a standard Windows executable binary (.exe) from a jar file
- Launch4J Windows native executable java application wrapper
DataVision An open source database reporting tool similar to Crystal Reports
PDFBox manipulating PDF documents and extracting contents from existing PDF documents
XPath Explorer
IronTrack SQL Display database usage over time, overlay and comparing performance datasets with no source code changes.
Structural Analysis for Java
Open Source Profilers for Java
IzPack cross-platform installers in Java.
BrowserLaunch Cross platform web browser launcher

Code Formatter

JHighlight syntax highlighting library that reads Java, HTML, XHTML, XML, and LZX languages and outputs syntax colored XHTML.
Pretty Printer for PHP, Java, C++, C, Perl, JavaScript, CSS online service
BeautyJ Customizable Java Source Code Transformation Tool
Jalopy

HTML parser class library for parsing “real-world HTML.” This release adds support for proxies, passwords and cookies. It also provides a new API for filters.

UMLGraph Declarative Drawing of UML Diagrams; requires Java Doc? and GraphViz Graph Visualization Software
UMLet or UMLet.com

Qexo – The GNU Kawa implementation of XQuery An XQuery statement is compiled down to Java bytecodes using the Kawa framework. Kawa also includes a proof-of-concept implementation of XSLT.
Galax An open-source implementation of XQuery 1.0, the W3C XML Query Language. Galax closely tracks the definition of XQuery 1.0 as specified by the W3C and also implements XPath 2.0, which is a subset of XQuery 1.0.