http://www.auran.com/jet - Auran Jet 3D homepage

http://www.radonlabs.de/ - The creators of The Nebula Device

http://crystal.sourceforge.net/ - An open source, multi platform 3D engine

http://www.egerter.com/ - A commercial windows 3D engine

http://www.destiny3d.com/ - The new version of Genesis 3D

http://www.wildtangent.com/developer/ - An ActiveX engine designed to run within a web browser

http://www.aztica.com/ - A Delphi engine with an ActiveX wrapper

http://www.twilight3d.com/products/prophecy/download/ - At the moment this is more of a wrapper around OpenGL, but a 3D engine is coming soon

http://www.tooltech-software.com/ - A Linux and Windows 3D engine

http://www.truevision3dsdk.com/ - A Visual Basic 3D engine

http://www.lightcube.com/pages_xhtml/technology.html - Another web based 3D engine

http://conitec.net/a4info.htm - A commercial windows 3D engine

http://www.fly3d.com.br/ - An advanced 3D quake-like engine

http://ogre.sourceforge.net/ - A new 3D rendering engine with Quake 3 level support

http://fmod.org/ - An excellent 3D sound engine

http://www.win.tue.nl/dynamo/ - A free physics engine

http://photoneffect.com/coldet/ - A free free collision library

http://www.win.tue.nl/%7Egino/solid/ - A collision library (code here)

http://www.libsolid.com/ - The latest commercial version of Solid, but is still free for non-commerical use

http://www.flipcode.com - A games development news site

http://www.gamedev.net - Another games development news site

http://www-106.ibm.com/developerworks/ - An incredibly useful site with tutorials on Linux, Java, XML and a whole bunch of other things. Most articles require registration, which is free.

http://xml.apache.org/xerces-c/index.html - A C++ XML API (how many acronym's can you fit into one sentence?)

http://www.stack.nl/%7Edimitri/doxygen/ - A documentation tool for C, C++ and Java

http://www.w3schools.com/sql/default.asp - A great SQL resource