| Bin_prot | Support for reading and writing OCaml-values in a type-safe binary protocol. |
| Caml | OCaml standard library. |
| Core | Standard library overlay. |
| Core_extended | Extended core library. |
| Pcre | Perl Compatible Regular Expressions. |
| Sexplib | S-expression library. |
| Type_conv | Generates code from type specifications for preprocessing. |