XendApp is a free messaging web service that combines e-mail and SMS capabilities. Sender can arrange multiple delivery channels to different audiences separated by interests. Delivery is possible after subscription is done via site or mobile application. Front end is desktop and mobile based application. iOS, Android, Windows supported. Application idea is to combine email and SMS service.

Technologies used: MS SQL 2008, ASP.NET WinForms, WCF, jQuery, PushSharp, TFS.