Ocaml has opam, a package manager, with currently 1227 packages in it. https://opam.ocaml.org/ The standard library of ocaml is quite basic, so usually, you use either Core (https://github.com/janestreet/core) or Batteries Included (https://github.com/ocaml-batteries-team/batteries-included) I personnally prefer Batteries because it tries to stay compatible with the standard library.