Top 2 son open source projects

json-next gem - read generation y / next generation json versions (HanSON, SON, JSONX/JSON11, etc.) with comments, unquoted keys, multi-line strings, trailing commas, optional commas, and more

A Collection of What's Next for Awesome JSON (JavaScript Object Notation) for Structured (Meta) Data in Text - JSON5, HJSON, HanSON, TJSON, SON, CSON, USON, JSONX/JSON11 & Many More