An NLP Solver based on a primal-dual interior-point filter algorithm

ipfilter is a solver for nonlinear programming problems (defined by the minimization of an objective function in a feasible region defined by equality and inequality constraints). ipfilter is freely available for academic purposes (i.e., as a tool for education or for basic research, as well as for benchmarking).

References: The ipfilter team:
Renata Silva and Luís Nunes Vicente (University of Coimbra)
Michael Ulbrich (Technical University of Munich)
Stefan Ulbrich (Technical University of Darmstadt)