Original script by Xembie, PhaethonH, Bob Holcomb, Damien McGinnes, Robert (Tr3B) Beckebans.
Modified by MaxED.
WARNING: This script is outdated. MD3 Exporter script for Blender 2.63+ is avaliable here: http://www.katsbits.com/tools/
What it is:
It's a modified version of MD3 Exporter v1.4, which allows to export animated models from Blender for use with GZDoom (perhaps with other source ports, which support md3 models, but I haven't tested that).
New features:
1. Offsets of objects are now exported correctly (object's origin don't have to be at 0,0,0 now).
2. Rotations of objects are now exported in a format GZDoom expects them to be.
3. No need to add "md3shader" custom property to objects (since it's not used in GZDoom).
4. New option "Convert quads to tris".
Requirements:
Blender 2.58a or newer (tested with Blender 2.62).
Installation:
1. Copy "io_mesh_md3" to "Blender/2.XX/scripts/addons"
2. Enable addon in User Preferences -> Addons -> Import-Export -> MD3 for GZDoom (.md3)
Usage:
1. Set correct start/end frame
2. Select you'r model part(s)
3. File -> Export -> MD3 for GZDoom (.md3)
Download it here
Original script can be found here