OpenSwing is a components library that provides a rich set of advanced graphics components for developing desktop applications and HTTP/RMI based java applications/RIAs based on Swing front-end. It provides also adapters for Hibernate, JPA, iBatis, etc.
Scriptable Multimedial Interactive Locations Engine, is a C++ written multiplatform engine designed to provide simple way to create 2D games and visualisations. SMILE consists of a shared library built upon SDL, data/ script interpret and Qt editor.
Wintermute Engine Development Kit is a set of tools for creating and running graphical “point&click” adventure games, both traditional 2D ones and modern 2.5D games (3D characters on 2D backgrounds).