Tclode is a compiled extension by Kevin Kenny that makes it possible to use the ODEPACK library to solve systems of ordinary differential equations from within Tcl.
Its home is at: [L1 ]
Note: The nice thing about ODEPACK and therefore Tclode is that it automatically choses the best method for solving the system at hand. It uses a whole scala of methods to achieve this goal without the user having to worry about it.