Apollo - Apollo is a full project management and contact tracking application.
JsonAPI - Application and Data, Languages & Frameworks, and Query Languages
graphql.js - A reference implementation of GraphQL for JavaScript - graphql/graphql-js
GraphQL - GraphQL is a data query language and runtime to request and deliver data to mobile and web apps.
PostGraphile - GraphQL API for Postgres
OData - OData, short for Open Data Protocol, is an open protocol to allow the creation and consumption of queryable and interoperable RESTful APIs in a simple and standard way.