Docs, Sheets and Forms add-ons now open to all developers

In April 2015, Google opened up the Google Docs, Sheets, and Forms add-ons to all developers, graduating them from the developer preview phase that began in 2014. Since their introduction, the developer community has created numerous features to enhance productivity for millions of users. Google has implemented several developer-friendly features, such as the ability to publish add-ons in the Google Apps Marketplace, bundle them with existing listings, utilize Apps Script triggers, and employ testing tools. Developers can also use standalone scripts, their own Google Developers console projects, and an iframe sandbox mode for faster UI. With these advancements, any developer can now publish an add-on, though all new add-ons will be reviewed for guideline adherence before appearing in the add-ons store. Google expresses enthusiasm for the potential new tools developers will create.