OCaml Packages

Explore thousands of open-source OCaml packages with their documentation.

Opam: The OCaml Package Manager

Opam is a source-based package manager for OCaml. It supports multiple simultaneous compiler installations, flexible package constraints, and a Git-friendly development workflow.

3909

Packages

New packages this month

126

Updates this week

Featured Packages

Discover new and OCaml packages from featured community packages.

dune

Fast, portable, and opinionated build system

3.3.1

dream

Tidy, feature-complete Web framework

1.0.0~alpha4

js_of_ocaml

Compiler from OCaml bytecode to JavaScript

4.0.0

mirage

The MirageOS library operating system

4.1.1

Most Used Packages

odoc

OCaml documentation generator

Used by 641 other packages

lwt

Promises and event-driven I/O

Used by 511 other packages

alcotest

Alcotest is a lightweight and colourful test framework

Used by 444 other packages

cmdliner

Declarative definition of command line interfaces for OCaml

Used by 328 other packages

ounit

This is a transition package, ounit is now ounit2

Used by 302 other packages

New Packages

kmt

Framework for deriving Kleene Algebras with Tests (KAT)

3 days ago

runtime_events_tools

Tools for the runtime events tracing system in OCaml

4 days ago

swhid_core

OCaml library to work with swhids

5 days ago

colibrics

A CP solver proved in Why3

6 days ago

chrome-trace

Chrome trace event generation library

6 days ago

Focus on Your Code, and Opam Takes Care of Distributing It.

Our users have the highest standards for the OCaml ecosystem to run mission-critical applications across a variety of operating systems, and they expect that a package that compiles today will still work a decade from now.

Continuous Integration

Before any package update, we run sandboxed matrix builds for boundaries of the dependencies and for each of the dependent packages. A package publication will never break the rest of the ecosystem.

State of the Art

Opam supports publishing multiple versions of packages simultaneously to specify the version constraints, so only compatible revisions are chosen for a build. It comes with a performant constraint solver, a flexible CLI, a well-specified metadata format, and an easy access to the package manager logic via OCaml libraries.

Stability

The Opam project and package repository is maintained by a team of developers who ensure that everything is not only running smoothly, but also curated to maintain a high degree of metadata quality. This makes it one of the most stable package repositories available today.

Start Contributing

Learn how to publish your first Opam package today and make it available to the rest of the community.

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