http://www.geology.washington.edu/~ghiorso/ "MELTS"
is an easy-to-use implementation of a sophisticated thermodynamic model of
igneous phases maintained by Mark Ghiorso and Richard Sack. MELTS allows
the user to simulate most igneous processes occuring in the crust and
upper mantle. In addition, th ere are web-based supplementary applications
for special calculations and an igneous rock database
http://www-ep.es.llnl.gov/germ GERM -- the
Global Earth Reference Model -- is a
work-in-progress by the geochemical community. It is an effort to
establish best estimates of elemental and isotopic compositions of the
Earth's major geochemical reservoirs and fluxes between them