SharePoint Add-ins

SharePoint Add-ins
https://msdn.microsoft.com/en-us/library/office/fp179930.aspx

SharePoint Add-ins compared with SharePoint solutions
https://msdn.microsoft.com/en-us/library/office/jj163114.aspx

New name for apps for SharePoint
https://msdn.microsoft.com/en-us/library/office/fp161507.aspx#bk_newname

Access SharePoint from mobile and native device apps
https://msdn.microsoft.com/en-us/library/office/dn986615.aspx