SUNDIALS provides robust time integrators and nonlinear solvers designed to be easily incorporated into existing simulation codes. SUNDIALS includes multistep ODE and DAE integrators and their forward and adjoint sensitivity-enabled versions, and techniques for solution of nonlinear algebraic equations.

Usage and applications: SUNDIALS is used in numerous applications in industry, Department of Energy (DOE) labs, and academia, and LLNL supports an active user community. SUNDIALS technologies are also used in SciDAC climate and dislocation dynamics applications.