Drombler FX is a modular RCP for JavaFX based on OSGi and Maven.
CactusGUI - a GUI for Pygame
A Java 7 library for parsing command lines.
Plugin based multi-purpose dev tool.
Generate MUI GUI sourcecode from XML file
A dynamic web menu based on PHP, Javascript and optionally a DB.
generate multi page html web forms for easy download to web server
jchart2d is a real-time charting library written in java.
Java GUIs made easy!
Advanced multiplatform text editor for developers
A Java-written extractor for all your Thymeleaf localization strings
A SFML GUI library intended mainly for my personal use.
Command Line Argument Parsing Library
Add Ajax capabilities to Rails websites with history, bookmarking...
An automatic, configuration-less, GUI for Arduino projects.
A quick & dirty XUL / XBL prototyping editor for user interface.
A library in C++ for creating old-school graphic tiles.