The MODULOPT library is made of three parts:

To get an optimization routine, click on the button "Optimization solvers" in the menu on the left and see whether the available solvers suit your needs.

The collections of problems are distributed as parts of Libopt, under the names modulopt, moduloptmatlab, and modulopttoys.

The Libopt environment is both a methodology and a set of tools that can be used for testing, comparing, and profiling solvers on problems belonging to various collections.