To give you a better idea of what this project is about, here are some of the aims for the future of OpenMW:

Be a full featured reimplementation of Morrowind.
Run natively on Windows, Linux and MacOS X.
Support all existing content, including Tribunal, Bloodmoon and all user created mods.
Allow much greater modability: change game rules, create new spell effects, etc through scripting.
Fix system design bugs, like the “dirty” GMST entries in mods, and the savegame “doubling” problem.
Improve the interface and journal system.
(Possibly) Improve game mechanics, physics, combat and AI.
(Possibly) Support multiplayer at some point.
(Possibly) Improve graphics to use more modern hardware.
It’s a pretty ambitious list, and there’s a lot left to do before these goals can become reality. You should check below for information about the current development status.

OpenMW is released under the GNU General Public License version 3, and all source code has been written completely from scratch. It also builds on various other open source tools, most notably OGRE for graphics, and Bullet for collision (and possibly physics).