This section provides samples and learning resources for Gmail add-ons.
ExpenseIt intro codelab
The GitHub Reader is a sample add-on that demonstrates using external services to bring rich information into Gmail, as well as contextual triggering based on email content. It triggers in response to messages that contain GitHub-issued links or pull requests. It also displays additional relevant information about those links or pull requests.
The Meeting Assistant makes it easy to create meetings from email threads. It demonstrates interactivity and use of the Calendar API service.