Dan Lazin, a technical writer for the Google Apps team, explained further in a blog post on Tuesday that the tools and APIs for add-ons are available to everyone. The Google Apps team only steps in ahead of final publication to the store.
From there, developers can submit working prototypes of add-ons to Google Apps for admission. At launch, Google has 25 add-on partners. Add-ons will do everything from print labels to customize emails. For instance, PandaDoc is an add-on that allows you to create legally binding documents with digital signatures, notations and other features.
Just a little over a year ago, Google reformatted the Drive sidebar menu so that "Drive-connected" apps would be displayed at the same level as Google-produced apps such as Docs and Sheets.
Google has also been busy targeting corporate Google Apps users this week. On Monday, the Mountain View, Calif.-headquartered company introduced a new referral program rewarding $15 bonus per new user subscription. The program suggests a new strategy in taking on Microsoft Office 365.
For another look at the Google Docs and Sheets Add-Ons, check out the promo video below: