kepler_ode, a Python code which defines the ordinary differential equations (ODE) for a Kepler two body gravitational problem.
The computer code and data files described and made available on this web page are distributed under the GNU LGPL license.
kepler_ode is available in a MATLAB version and an Octave version and a Python version.
python_ode, Python codes which sets up various systems of ordinary differential equations (ODE).