A few months ago we reviewed an interesting app called Texty. This app connects an Android phone to a computer through Chrome, and allows the user to send text messages straight from said browser. This is useful when you are working on your computer and you do not wish to move your hands away from your comfortable ergonomic keyboard and start pecking away at a small 3-4" screen. CrossTxT performs a similar function, but in my opinion, is far superior to Texty.
Firstly, CrossTxT is currently in beta and you will have to sign-up for a free invite.