SUNDIALS (SUite of Nonlinear and DIfferential/ALgebraic
equation Solvers) provides robust time integrators and
nonlinear solvers that can easily be incorporated into
existing simulation codes.
SUNDIALS consists of the following four solvers:
CVODE solves initial value problems for ordinary differential equation (ODE) systems.
CVODES solves ODE systems and includes sensitivity analysis capabilities (forward and adjoint).
IDA solves initial value problems for differential-algebraic equation (DAE) systems.