XmdS - eXtensible multi-dimensional Simulator
XmdS looks like an interesting package:
XMDS is a code generator that integrates equations. You write them down in human readable form in an XML file, and it goes away and writes and compiles a C++ program that integrates those equations as fast as it can possibly be done in your architecture.
Personally I thought it might be drawing a long bow to call XML “human readable”, but some of the examples aren’t too bad at all.
