YAML - YAML 1.2 --- YAML: YAML Ain't Markup Language
JsonAPI - Application and Data, Languages & Frameworks, and Query Languages
TOML - TOML - Tom's Obvious, Minimal Language
graphql.js - A reference implementation of GraphQL for JavaScript - graphql/graphql-js
JSON - (JavaScript Object Notation) is a lightweight data-interchange format
Apollo - Apollo is a full project management and contact tracking application.