Outlook.com API brings add-ons from PayPal, Boomerang, Uber and more


Add-ons are a common feature of traditional, offline applications, but they're becoming increasingly popular in online services. Microsoft is the latest to get in on the action, announcing a batch of new add-ons for Outlook.com, including one from PayPal that makes it easy to make payments via email.
The add-ons were made possible when Microsoft launched the Outlook APIs at Build. They can be used by developers to create plugins with HTML, CSS3, and JavaScript. Microsoft is pushing the "write once, run anywhere" nature of the API that means the same plugin can run in Outlook.com, Outlook Web App and the desktop version of Outlook.
Microsoft HoloLens can run Windows apps in 3D


When Microsoft unveiled HoloLens a few months ago, it came as something of a surprise. It's essentially Google Glass meets virtual reality on steroids, throwing the users into a 3D world filled with holograms, all powered by Windows 10. Today at build 2015, Microsoft showed off some of HoleLens' capabilities.
Something that had been talked about when HoloLens first came to light was the possibility of running regular Windows 10 apps in HoloLens. In a demonstration, Microsoft showed how Windows 10 Universal apps can be used in 3D space, 'projected' onto floors, walls and other surfaces.
Windows Store to gain subscriptions and phone payments


Today at Build 2015, Microsoft revealed some exciting changes to the Windows Store -- not least that it will soon be much, much easier for iOS and Android app developers to convert their creations into Windows 10 apps. But this is far from the end of the story, and there are also important payment and subscription options on the horizon.
Microsoft is introducing support for in-app purchasing of subscriptions, providing developers with new ways to monetize their apps. To help make it easier for devs to get money from customers, the ability to pay for purchases with a mobile phone is also to be added.