Here are a list of products, in no particular order, which will help improve the quality of end user experience for Azure hosted applications. This list is an organic aggregation of tribal knowledge and is not a definitive one. If you have any suggestions, please feel free to send it to me through comments...

  Previously Sync Framework required  a Windows  machine with Sync runtime installed on the client side. The Sync Framework 4.0 now leverages a remote sync service and hence any client that speak HTTP and OData can build occasionally connected  applications by leveraging Sync Framework...