| Base64 | Base64 codec. |
| BitSet | Efficient bit sets. |
| Dllist | A mutable, imperative, circular, doubly linked list library |
| DynArray | Dynamic arrays. |
| Enum | Enumeration over abstract collection of elements. |
| ExtArray | Additional and modified functions for arrays. |
| ExtBuffer | Extra functions over text buffers. |
| ExtBytes | |
| ExtHashtbl | Extra functions over hashtables. |
| ExtLib | |
| ExtList | Additional and modified functions for lists. |
| ExtString | Additional functions for string manipulations. |
| Global | Mutable global variable. |
| IO | High-order abstract I/O. |
| OptParse | Modules for GNU |
| Option | Functions for the option type. |
| PMap | Polymorphic Map. |
| RefList | Reference on lists. |
| Std | Additional functions. |
| UChar | Unicode (ISO-UCS) characters. |
| UTF8 | UTF-8 encoded Unicode strings. |
| Unzip | Decompression algorithm. |