Morpheus is a morphological parsing and lemmatising tool produced by the Perseus Project. Basically Morpheus takes as input a token in Latin or Ancient Greek (in Beta Code) and returns:
Morpheus is fully integrated into the Perseus website and language study tools. For example, you can enter inflected words via the forms at:
(Apparently the Open Source version of the Perseus Hopper does not include the Morpheus code.)
Morpheus can also be queried with Latin or Greek word forms (and a few modern languages) via the interface at the Archimedes project in Berlin (instructions for XML-RPC interface) via a customizable Python or Perl script.
References to other implementations of Morpheus would be appreciated.