Dune - Composable build system for OCaml.
Esy - Package.json workflow for native development with Reason/OCaml.
mlsub - Prototype type inference engine.
OCamlFormat - Auto-formatter for OCaml code.
utop - Universal toplevel for OCaml.
Dune starter kit - Provides templates to help you start an OCaml project. It can be used to create multiple libraries, multiple executables, and test suites.
OCaPIC - Programming PIC microcontrollers in OCaml.
GoCaml - Subset of OCaml in Go based on MinCaml using LLVM.
oskel - Skeleton generator for OCaml projects.
OCaml-CI - CI for OCaml projects.
OCurrent - Allows you to specify a workflow / pipeline for keeping things up-to-date.
Domical - In-browser OCaml notebooks.
Bisect_ppx - Code coverage for OCaml and Reason.
modern-ocaml - Template for an ocaml project with modern tooling.
OCaml-Java - Run OCaml code on a JVM, and manipulate Java entities from OCaml.
duniverse - Experimental vendoring system for Dune.