There are many messaging programs out there now, so it?s no surprise that the communications giant AT&T has entered the ring. AT&T Messages is a free app for sending and receiving text messages from your PC and Tablet. The benefit is that this uses your mobile number, so people who usually text you can get in touch and vice versa, when your phone isn?t available. This allows you to start a conversation by text and then continue at your PC, or copy/paste something from your PC to a text instead of typing it out again. Picture and voice messaging is also integrated.