Hmap provides heterogeneous value maps for OCaml. These maps bind keys to values with arbitrary types. Keys witness the type of the value they are bound to which allows adding and looking up bindings in a type safe manner.

Uses the new result type defined in OCaml >= 4.03 while staying compatible with older version of OCaml should use the Result module defined in this library.

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.

This package expands @disable_unused_warnings into @warning "-20-26-32-33-34-35-36-37-38-39-60-66-67"

This package provides a package dependency resolver based on a SAT solver. This was originally written for the 0install package manager, but is now generic and is also used as a solver backend for opam. The SAT solver is based on MiniSat (http://minisat.se/Papers.html) and the application to package management is based on OPIUM (Optimal Package Install/Uninstall Manager). 0install-solver uses a (novel?) strategy to find the optimal solution extremely quickly (even for a SAT-based solver).

This is the binding for SHA interface code in OCaml, offering the same interface as the MD5 digest included in the OCaml standard library. It currently provides SHA1, SHA256 and SHA512 hash functions.

Ignore Jane Street specific instrumentation extensions from internal PPXs or compiler features not yet upstreamed.

Ezjsonm provides more convenient (but far less flexible) input and output functions that go to and from [string] values than jsonm. This avoids the need to write signal code, which is useful for quick scripts that manipulate JSON.

This package is a no-op ppx rewriter. It is used as a lint tool to enforce some coding conventions across all Jane Street packages.

Bos provides support for basic and robust interaction with the operating system in OCaml. It has functions to access the process environment, parse command line arguments, interact with the file system and run command line programs.

This ppx extension is used for deriving a witness that a type is intended to be stable. In this context, stable means that the serialization format will never change. This allows programs running at different versions of the code to safely communicate.

Compatibility module for OCaml standard library allowing programs to use some recent additions to the standard library while preserving the ability to be compiled on former versions of OCaml.

Monolith offers facilities for testing an OCaml library (for instance, a data structure implementation) by comparing it against a reference implementation. It can be used to perform either random testing or fuzz testing by using the afl-fuzz tool.

Lwt provides typed, composable cooperative threads. These make it easy to run normally-blocking I/O operations concurrently in a single process. Also, in many cases, Lwt threads can interact without the need for locks or other synchronization primitives.

This library offers a lightweight way for applications protocols to version themselves. The more protocols that add themselves to Known_protocol, the nicer error messages we will get when connecting to a service while using the wrong protocol.

Ocb-stubblr is about ten lines of code that you need to repeat over, over, over and over again if you are using ocamlbuild to build OCaml projects that contain C stubs.

Unix-specific extensions to some of the modules defined in core and core_kernel.

This library provides minimal support for Canonical S-expressions. Canonical S-expressions are a binary encoding of S-expressions that is super simple and well suited for communication between programs.

This library only provides a few helpers for simple applications. If you need more advanced support, such as parsing from more fancy input sources, you should consider copying the code of this library given how simple parsing S-expressions in canonical form is.

To avoid a dependency on a particular S-expression library, the only module of this library is parameterised by the type of S-expressions.

Gen implements iterators of OCaml, that are both restartable and consumable.

Js_of_ocaml is a compiler from OCaml bytecode to JavaScript. It makes it possible to run pure OCaml programs in JavaScript environment like browsers and Node.js.

Merlin is an editor service that provides modern IDE features for OCaml. Emacs and Vim support is provided out-of-the-box. External contributors added support for Visual Studio Code, Sublime Text and Atom.

Ppx_tools provides tools for authors of ppx rewriters and other syntactic tools.

DSL to describe a set of modules and functors, their types and how to apply them in order to produce a complete application. The main use case is mirage.

Part of Jane Street's Core library The Core suite of libraries is an industrial strength alternative to OCaml's standard library that was developed by Jane Street, the largest industrial user of OCaml.