The Xith3d project consists of powerful middleware consisting of a scenegraph and an extensible renderer. The goal is to create a lean and performative scenegraph and renderer while at the same time allowing for extensions and enchancements to all stages of the rendering pipeline.
You can think of
... [More] it as a 3D engine. It allows to create games, or any application requiring a 3D visualization. It's versatile, usable with JOGL or LWJGL, embeddable in AWT, Swing, SWT (Eclipse).
It has support for physics engine (JOODE), and many development facilities.
It's fast and easy-to-use. [Less]
PodiGoat Core 3 is a open-source framework written in Delphi language. It owns unique interfaces allowing to manage and control almost all part of engine. PGCore3 can be used as a main framework for any kind of 2D or 3D games and interactive applications.
Azure: Infinite Skies is a free, realtime 3D game about flight simulation with some parts from RPG, as well. It's playing in a parralel world (mix of our world of 30s-50s and a fantasy world) with some really original vehicles and environments, combininig nice graphics, story and action.
... [More] written entirely in Python and it's based on the Panda3D game engine (http//panda3d.org). [Less]