The SWISS EPHEMERIS is the high precision ephemeris
developed by Astrodienst, largely based upon the DE406
ephemeris from NASA's JPL.

Developers can license the Ephemeris library.Ephemeris
users find 3200 years of read-made printable files of
ephemerides, containing 19'200 print pages in PDF quality.

The Swiss Ephemeris is available under a dual licensing
model: GPL2 or Swiss Ephemeris Professional License.

WWW: http://www.astro.com/swisseph/