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Protocols

For cryptographic protocols, see Security and Cryptography.

• obus: Pure OCaml implementation of the D-bus IPC protocol, used by Freedesktop and Linux.
• onanomsg: nanomsg bindings for OCaml.
• MQTT: MQTT is a protocol for the Internet of Things.
• Kafka: OCaml bindings for Apache Kafka.
• AMQP: AMQP client library for Async and Lwt.
• MPI: Message Passing Interface bindings for OCaml.
• MQTT: OCaml implementation of the MQTT pubsub protocol.
• asn1-combinators: Use the ASN.1 standard. See introducing ASN.1
• IMAP: lwt-compatible implementation of IMAP4rev1.
• wayland: Pure OCaml implementation of the Wayland graphical protocol, used in Linux.

ZeroMQ

• ocaml-zmq: ZeroMQ bindings for OCaml.
• async-zmq: Async wrapper around ocaml-zmq.
• lwt-zmq: Lwt-friendly interface to ZeroMQ for OCaml.

Protobuf

• ocaml-protoc-plugin: Full findings to Protobuf messages and types. Implements the full proto3 specification.
• protoc: Compiler from protobuf files to OCaml types.
• ppx_deriving_protobuf: Derive Protobuf files from OCaml types.

Capn-Proto

• capnp-ocaml: Code generator for cap’n-proto.
• capnp-rpc: RPC implemented over cap’n-proto.

Msgpack

• vcaml: Bindings for Neovim. Contains the fullest implementation of msgpack for OCaml.
• ocaml-msgpck: another implementation of msgpack.
• msgpack-ocaml: Slower, but the implementation is backed by a proof in Coq.

Miscellaneous

• optint: OCaml’s built-in int is 63-bits on 64-bit platforms and 31-bits on 32-bit platforms. optint allows 64-bit platforms to use the native int type for 32-bit values, while boxing on those platforms that need it (32-bit). This is extremely useful for high-performance interop with other languages, network protocols etc.