rk4, a C++ code which implements a simple Runge-Kutta solver for an initial value problem.
The computer code and data files described and made available on this web page are distributed under the GNU LGPL license.
rk4 is available in a C version and a C++ version and a FORTRAN90 version and a MATLAB version and a Python version.
gsl_test, a C++ library which includes routines for solving differential equations.
ode, a C++ library which solves a system of ordinary differential equations, by Shampine and Gordon.
rkf45, a C++ library which implements the Runge-Kutta-Fehlberg ODE solver.