Frozen Bubble. License Frozen Bubble is published under the GPL license. Frozen Bubble. Copyright (C) 2006 Glenn Sanson. Jake2. About Jake2 is a Java 3D game engine.
It is a port of the GPL’d Quake2 game engine from id Software. To use the Jake2 engine you need either the data files from the original game or from the demo version that is available for download from Jake2 uses jogl for OpenGL graphics and joal for 3D sound. FreeCol - Home.