MightyText is by far one of my favorite services/apps.  This service allows me to send and receive texts on my PC.   The functionality comes in great when I want to stay at my full PC keyboard, rather than physically picking up my cellphone.

The service installs an App on your smartphone(Android for now) . Then you install an app in the browser(Chrome, Firefox, IE and Safari), and boom !  Your set !

I have used this for tech support and archival purposes. Yes I now have a way of keeping my old text messages !