OAuth
Building Office 365 Single Page Applications on any platform
CORS simplifies building Office 365 SPAs. If you're however building multi-tenant applications on a stack without an SDK, there are a few things that you have to take care of.
Building applications with the Office 365 APIs on any platform
Thanks to Microsoft’s investments we can build add-ins and web apps on any platform, including platforms without dedicated Office 365 API SDKs.