Gmax is a free version of 3DSMax for game modelling.
You should also read the 3D Studio Max article to get more information about im- and export of your creations.
Setting up the md2 export plugins
- Copy the *.ms files from src/tools into your gmax plugins directory at c:\gmax\plugins.
- Start gmax and open the utility panel
- Now select MaxScript and select the import and export plugins to get the following view: