GraphQL
GraphQL Schema, Queries & Mutations
Tutorial
How to GraphQL : The free and open-source tutorial to learn all around GraphQL to go from zero to production.
GraphQL Language Support
There are several graphQL server and client libraries available for wide variety of languages. GraphQL Code
Some popular GraphQL Server libraries are 1. Apollo GraphQL Server (JS)
Some popular GraphQL Clients are 1. Apollo GraphQL Client (JS)