Ten years ago I published a first bit of free software. Over the years, this has now expanded to 28 OCaml packages, without counting random informally published elucubrations. Thanks to OCaml Labs' support, there will be more.
Uucd, Uucp, Uunf, Uuseg and Uutf were all refreshed for Unicode 9.0.0. They also support the new Uchar.t type introduced in OCaml 4.03 and compile with safe string. Find about them on the software page.