The KINSOL package within the SUNDIALS suite provides robust solvers for systems of algebraic nonlinear equations, including Newton-based and accelerated fixed point methods. Like other packages in SUNDIALS, parallelism is encapsulated in vector and linear solver modules.  

Usage and applications: KINSOL is used in numerous applications in industry, DOE labs, and academia, and LLNL supports an active user community. KINSOL is used within the ParaDiS dislocation dynamics simulator and the PARFLOW watershed simulator.