Cress is a comprehensive toolset for graphical service/workflow design
Pure Trait-based Programming on the Java Platform
Tool for parsing, verifying, browsing and converting EDIFACT and X12
Java-based scientific graphics
Embeddable/J2E/Desktop Java Wiki CMS
A lightweight ORM that does not require annotations.
a DSL for type systems, reduction rules, interpreters for Xtext langs
Java utilities for byte streams, readers and format detection
Java RDF Framework
Serial Communication between Java and Arduino made simple.
Java datastructures and algorithms extensions
JFig is a simple, powerful tool to manage application configuration
Database explorer to MySQL, Oracle, Sybase & others. Source maker JSF.