For us folks who like to stay Free and use the Blender 3d program over every other costly options!
md3 import - export script for blender. Read the description for details
This script exports models into trespasser formats. Supports writting TPM files as well as values.txt files. For the values file a set of filters is used...
Provides support for Blender3D to export models to the Half-Life 2 SMD format. Supports rigged meshes as well as animations.