Mirror your Android smartphone on your TV or PC screen, even for presentations, with LetsView
LetsView is a free program able to mirror the screen of your smartphone to a larger screen taking advantage of a WiFi connection.
LetsView supports Airplay and Miracast and can be a great help in a presentation, providing even a whiteboard. Of course you can use it simply to enjoy your movies and photos or play your smartphone games on the larger monitor of your TV or your PC.
Here I give you links for both the PC and the Android apps; you need both to establish a WiFi connection and enjoying mirroring your phone.
Note that your phone should support SmartView, that is Wireless Display or Projection.