Yojson is an optimized parsing and printing library for the
JSON format. It addresses a few shortcomings of json-wheel
including 2x speedup, polymorphic variants and optional
syntax for tuples and variants.

ydump is a pretty-printing command-line program provided
with the yojson package.

The program atdgen can be used to derive OCaml-JSON
serializers and deserializers from type definitions. 
