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Linear Programming Solver 

•  PCx   Primal-dual interior-point code for linear programming.

Quadratic Programming Solver

• OOQP Object-oriented interior-point code for convex quadratic programming.

Nonlinear Programming Solvers

•  KNITRO  Interior point method for constrained optimization. Also effective for unconstrained problems.
• CG+    Conjugate Gradient code for solving large-scale, unconstrained, nonlinear optimization problems.
•  DGSOL    Software package for solving large distance geometry problems in macromolecular modeling.
•  L-BFGS  Limited memory quasi-Newton method for the solution of large-scale unconstrained optimization problems.
•  L-BFGS-B   Limited-memory quasi-Newton code for large-scale bound-constrained or unconstrained optimization.
•  TRON   Trust region Newton method for the solution of large bound-constrained optimization problems.

Linear Algebra Software

•  ICFS    Incomplete Cholesky factorization for the solution of large-scale trust region subproblems and positive definite

systems of linear equations. 
•  PREQN   Package for automatically generating preconditioners for the conjugate gradient method.

Nonlinearly Constrained Problems Suite

•  COPS    A collection of large-scale nonlinearly Constrained Optimization ProblemS.