There are quite a few announcements coming out of Build 2016 conference, including the addition of Office Add-ins in Office for Mac. These are the new add-ins, formerly called apps, that are available in the Office store, and now will be available for Office for Mac end-users in the coming months.
Office 365 Connectors are another new feature, available only to Exchange online subscribers. They are used to deliver relevant content and updates from popular apps and services to Office 365 Groups. For example, I can use the Bing or Twitter connector to watch for keywords on the web or in Twitter. When the Bing connector finds a match, a message with links to the articles is placed in the group Inbox. The Twitter connector puts a message containing the tweets in the Inbox. There are more than 50 connectors available today, for services including Salesforce, Dynamics CRM Online, Wunderlist, Trello, Stack Overflow, GitHub, MailChimp, ZenDesk, and more.
More information about Office 365 Connectors is available at Introducing Office 365 Connectors. Developers may want to check out this Build 2016 session video: Building Office 365 Group Connectors
These videos from build sessions may be of interest to Office and Outlook developers:
Office Add-ins in Office for Mac
Building Immersive Add-in Experiences Through Outlook Module Extensibility
Module extensibility allows app developers the ability to create new modules within Outlook. Similar to Outlook's native mail, calendar and task modules developers can now provide their users with their own module which will host their app’s content.
Introducing Outlook Tasks in the Outlook Direct Endpoint
New Outlook Tasks API in preview. Will support both Office 365 business and Outlook.com mailboxes.
All Office 365 Sessions at Build 2016: Office 365 Sessions
