The following videos show a variety of example add-on applications. Each video generally walks through a short sample app to give you a jump start in trying specific platform features.
Expediting expense reports with Gmail Add-ons
Add-ons let you extend Gmail as well as integrate functionality from your app into Gmail's user interface. In this video, learn about the ExpenseIt! Gmail add-on, helping working professionals process receipts directly from their inbox into a Sheet, creating one place to complete their expense reports. Build the add-on piece-by-piece with its corresponding codelab.
(Running time: 5:18)
This feature is also described in the blog post “Gmail add-ons framework now available to all developers”.
Making progress (bars) with Slides Add-ons
Google Slides doesn't have progress bars. Wouldn't this be a useful feature for both presenters as well as audiences? In this video, developers learn how to implement simple progress bars by using the Slides service to create an add-on. With this add-on, users can enable or hide progress bars in their presentations. The code and a full description of this add-on can be found in the documentation as a Quickstart example.
(Running time: 4:12)
This feature is also described in the blog post “Making progress (bars) with Slides Add-ons”.