I personally use Core/Async/ppx_jane (my favorite is ppx_expect) with everything I do. A few others I’ve used include:
- rpc_parallel
- shexp
- delimited
- iron (very useful resource for seeing examples of a real world stateful app (I’m a little saddened that it’s no longer being released))
- sexp_pretty (I was so happy when I found this)
- textutils
I still haven’t prioritized time to dig into incremental and some of the other web libraries based on it, but I’m really itching to try them in some personal project at some point, hopefully soon.