The single font wntml is currently supported. It is a Metafont font. This font can only be used with the TEX interface.
The Metafont descriptions of the font are provided, you can use them to generate the PK files of any font size desired. The Metafont commands for three sizes: 10, 12, and 17 point sizes are provided (wntml10.mf, wntml12.mf, and wntml17.mf, respectively).
This font was developed at University of Washington, and I would like to thank them for making the font available as freeware.
See the reference document tamil.itx for the transliteration map and example texts. The IFM file for this font is wntml.ifm.