Here is a newbie question: could you recommend me a web UI framework capable to design user interfaces like the new Outlook Web in its last version? I'm asking this because I cannot find a technical paper from Microsoft explainin that.
Note: I'm looking for a technical answer more explained than only say HTML, CSS or JS... in case anyone can recommend a similar framework capable to build that kind of views I would be appreciated. If it is based in Bootstrap or similar framework, please comment that.
The Office UI Fabric is a framework similar to Bootstrap that contains many of the same components and styles that you see in Outlook Online: http://dev.office.com/fabric/components.
You can see an example of a UI built using a mix of Fabric and Bootstrap with my MessageFiler for Outlook app: http://www.rockinsoftware.rocks/MessageFiler.html