Uunf is an OCaml library for normalizing Unicode text. It supports all Unicode normalization forms. The library is independent from any IO mechanism or Unicode text data structure and it can process text without a complete in-memory representation.

This library implements structured concurrency for ocaml. It offers no backwards compatibility guarantees.

UTop is an improved toplevel for OCaml. It can run in a terminal or in Emacs. It supports line editing, history, real-time and context sensitive completion, colors, and more.

This library contains functionality for reading and writing OCaml-values in a type-safe binary protocol. It is extremely efficient, typically supporting type-safe marshalling and unmarshalling of even highly structured values at speeds sufficient to saturate a gigabit connection. The protocol is also heavily optimized for size, making it ideal for long-term storage of large amounts of data.

This module provides an abstract engine for text edition. It can be used to write text editors, edition widgets, readlines, and more. The module Zed uses Camomile to fully support the Unicode specification, and implements an UTF-8 encoded string type with validation, and a rope datastructure to achieve efficient operations on large Unicode buffers. Zed also features a regular expression search on ropes. To support efficient text edition capabilities, Zed provides macro recording and cursor management facilities.

This package provides a splittable PRNG functions like a PRNG that can be used as a stream of random values; it can also be split to produce a second, independent stream of random values.

This library implements a splittable pseudo-random number generator that sacrifices cryptographic-quality randomness in favor of performance.

MirageOS OS library for Xen targets, which handles the main loop and timers. It also provides the low level C startup code and C stubs required by the OCaml code.

This OCaml library provides two new integer types, Optint.t and Int63.t, which guarantee efficient representation on 64-bit architectures and provide a best-effort boxed representation on 32-bit architectures.

opam-installer is a tool for installing OCaml packages based on .install files defined by the OPAM package manager. It is useful for installing OCaml packages without requiring the entirety of OPAM.

Crowbar is a library for testing code, combining QuickCheck-style property-based testing and the magical bug-finding powers of afl-fuzz.

This library implements the standard functions used by Dune.

Provides a single module named Stringext that provides a grab bag of often used but missing string functions from the stdlib. E.g, split, full_split, cut, rcut, etc..

Library for asynchronous programming, i.e., programming where some part of the program must wait for things that happen at times determined by some external entity (like a human or another program).

This package adds S-exp support to ocaml-uri.

Provides an OCaml interface to operations that have dedicated hardware instructions on some micro-architectures, with default implementations using C stubs for all targets.

C header files shared between the various Jane Street packages.

Dune is a build system for OCaml. It provides a consistent experience and takes care of the low-level details of OCaml compilation. Descriptions of projects, libraries and executables are provided in dune files following an s-expression syntax.

Base is a complete and portable alternative to the OCaml standard library. It provides all standard functionalities one would expect from a language standard library. It uses consistent conventions across all of its module.

Base aims to be usable in any context. As a result system dependent features such as I/O are not offered by Base. They are instead provided by companion libraries such as ocaml-stdio.

Uucd is an OCaml module to decode the data of the Unicode character database from its XML representation. It provides high-level (but not necessarily efficient) access to the data so that efficient representations can be extracted.

This library parses ocaml compiler output and returns it as ocaml values. This library offers no backwards compatibility guarantees.

Astring exposes an alternative String module for OCaml. This module balances minimality and expressiveness for basic, index-free, string processing and provides types and functions for substrings, string sets and string maps. The String module exposed by Astring has exception safe functions, removes deprecated and rarely used functions, alters some signatures and names, adds a few missing functions and fully exploits OCaml's newfound string immutability.

Libraries for creating shared memory producer/consumer rings. The rings follow the Xen ABI and may be used to create or implement Xen virtual devices.

OCamlbuild is a generic build tool, that has built-in rules for building OCaml library and programs.

Cppo is an equivalent of the C preprocessor for OCaml programs. It allows the definition of simple macros and file inclusion. Cppo is:

1. more OCaml-friendly than cpp

2. easy to learn without consulting a manual

3. reasonably fast

4. simple to install and to maintain.