altair

Available as a web app, browser extensions for Chrome and Firefox, desktop application, and Express.js middleware, as shown by the multiple badges in the README.

Includes query history, variables, headers, and documentation explorer, which streamline GraphQL development and testing, as highlighted in the key features.

Supports team collaboration with shared queries and environments, enhancing productivity in group settings, as mentioned in the description.

Functions as a Progressive Web App, allowing use without an internet connection, which is a key feature for on-the-go development.