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.

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.

Library for building RPC-style protocols. This library is the portable part of the Unix-oriented Async_rpc library, and is actively used in JavaScript.

Cmdliner is a module for the declarative definition of command line interfaces. It provides a simple and compositional mechanism to convert command line arguments to OCaml values and pass them to your functions. The module automatically handles syntax errors, help messages and UNIX man page generation. It supports programs with single or multiple commands and respects most of the POSIX and GNU conventions.

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

Used to trace execution of OCaml/Lwt programs (such as Mirage unikernels) at the level of Lwt threads. The traces can be viewed using JavaScript or GTK viewers provided by mirage-trace-viewer or processed by tools supporting the Common Trace Format. When compiled against a normal version of Lwt, OCaml's cross-module inlining will optimise these calls away, meaning there should be no overhead in the non-profiling case.

This library provides generic parsers for parsing S-expressions from strings or other medium.

The library is focused on performances but still provide full generic parsers that can be used with strings, bigstrings, lexing buffers, character streams or any other sources effortlessly.

It provides three different class of parsers:

• the normal parsers, producing [Sexp.t] or [Sexp.t list] values

• the parsers with positions, building compact position sequences so that one can recover original positions in order to report properly located errors at little cost

• the Concrete Syntax Tree parsers, produce values of type Parsexp.Cst.t which record the concrete layout of the s-expression syntax, including comments

This library is portable and doesn't provide IO functions. To read s-expressions from files or other external sources, you should use parsexp_io.

This package provides OCaml bindings to the Linux io_uring kernel IO interfaces.

Lexer generator for Unicode and OCaml.

This library represents element ordering in OCaml.

Dune-configurator is a small library that helps writing OCaml scripts that test features available on the system, in order to generate config.h files for instance. Among other things, dune-configurator allows one to:

• test if a C program compiles

• query pkg-config

• import #define from OCaml header files

• generate config.h file

This package provides a parser of email address according RFC822, RFC2822, RFC5321 and RFC6532. It handles UTF-8 email addresses and encoded-word according RFC2047.

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.

Eio_main selects an appropriate backend (e.g. eio_linux or eio_luv), depending on your platform.

Generate modules from OCaml source files.

Defines compile-time constants used in Jane Street libraries such as Base, Core, and Async. This package has an unstable interface; it is intended only to share configuration between different packages from Jane Street. Future updates may not be backward-compatible, and we do not recommend using this package directly.

This package implements an Ocaml language server implementation.

These libraries provides access to low-level compiler interfaces and the standard higher-level merlin protocol.

Camomile is a Unicode library for OCaml. Camomile provides Unicode character type, UTF-8, UTF-16, UTF-32 strings, conversion to/from about 200 encodings, collation and locale-sensitive case mappings, and more. The library is currently designed for Unicode Standard 3.2.

Eio_luv provides a cross-platform backend for Ocaml Eio's APIs using luv (libuv)

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.

Modules using ppx_module_timer have instrumentation to record their startup time.

Utilities for working with terminal output, such as color printing.

The "findlib" library provides a scheme to manage reusable software components (packages), and includes tools that support this scheme. Packages are collections of OCaml modules for which metainformation can be stored. The packages are kept in the file system hierarchy, but with strict directory structure. The library contains functions to look the directory up that stores a package, to query metainformation about a package, and to retrieve dependency information about multiple packages. There is also a tool that allows the user to enter queries on the command-line. In order to simplify compilation and linkage, there are new frontends of the various OCaml compilers that can directly deal with packages.