Similar to make utilities you may have used, but it features many additional enhancements, including:

1. Support for projects spanning several directories or directory hierarchies.

2. Fast, reliable, automated, scriptable dependency analysis using MD5 digests, with full support for incremental builds.

3. Dependency analysis takes the command lines into account — whenever the command line used to build a target changes, the target is considered out-of-date.

4. Fully scriptable, includes a library that providing support for standard tasks in C, C++, OCaml, and LaTeX projects, or a mixture thereof.

Contains Async's core data structures, like Deferred. Async_kernel is portable, and so can be used in JavaScript using Async_js.

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.

This package is an OCaml library to parse and generate the YAML file format. It is intended to be interoperable with the Ezjsonm JSON handling library, if the simple common subset of Yaml is used. Anchors and other advanced Yaml features are not implemented in the JSON compatibility layer.

This module implements strict impure trie tree data structure for OCaml.

ppx-fixed-literal is a ppx rewriter that rewrites fixed point literal of the form 1.0v to conversion functions currently in scope.

Octavius is a library to parse the `ocamldoc` comment syntax.

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.

ocaml-dot-merlin-reader is an external reader for ocaml-merlin configurations.

Timezone handles parsing timezone data and create Timezone.t that can later be used to manipulate time in core_kernel or core.

OCamlFormat is a tool to automatically format OCaml code in a uniform style.

This package contains deriving conversion functions to and from yaml for OCaml types.

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.

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.

Uuseg is an OCaml library for segmenting Unicode text. It implements the locale independent Unicode text segmentation algorithms to detect grapheme cluster, word and sentence boundaries and the Unicode line breaking algorithm to detect line break opportunities.

The library is independent from any IO mechanism or Unicode text data structure and it can process text without a complete in-memory representation.

Base64 is a group of similar binary-to-text encoding schemes that represent binary data in an ASCII string format by translating it into a radix-64 representation. It is specified in RFC 4648.

Cohttp is an OCaml library for creating HTTP daemons. It has a portable HTTP parser, and implementations using various asynchronous programming libraries.

Provides easy access to compressed files in ZIP, GZIP and JAR format. It provides functions for reading from and writing to compressed files in these formats.

Part of the Jane Street's PPX rewriters collection.

This package provides a non-blocking encoder/decoder of Quoted-Printable according to RFC2045 and RFC2047 (about encoded-word). Useful to translate contents of emails.

This package provides types and operations over dates and times.

Bisect_ppx helps you test thoroughly. It is a small preprocessor that inserts instrumentation at places in your code, such as if-then-else and match expressions. After you run tests, Bisect_ppx gives a nice HTML report showing which places were visited and which were missed.

Usage is simple - add package bisect_ppx when building tests, run your tests, then run the Bisect_ppx report tool on the generated visitation files.

The graphics library provides a set of portable drawing primitives. Drawing takes place in a separate window that is created when Graphics.open_graph is called. This library used to be distributed with OCaml up to OCaml 4.08.

Client-side URL transfer library, supporting HTTP and a multitude of other network protocols (FTP/SMTP/RTSP/etc).