The Apollo GraphQL data stack is a technical preview release announced by Sashko Stubailo, aiming to enable experimentation with client and server-side components that interact between UI frameworks and backend services. The initial set of tools and integrations includes the Apollo Client, GraphQL Tools, and native integrations for React, Angular, Meteor, and Redux. Three example apps are available to demonstrate how the different parts might fit together, including a full-stack app with Material UI on top of Discourse, a GraphQL server example using SQL and MongoDB, and a bare-bones Meteor starter kit. The documentation site provides detailed information on the current set of packages, while the website introduces people to the project. The focus is on building a full-stack solution for GraphQL that's easy to get started with and scales as the app grows.