TextWand

TextWand is your Desktop Messenger that works on other Mobile and PC platforms too. It runs as a service in the background so you can get Push messages instantly like SMS, except that it is completely free to use globally. Any message that you send or receive from your Phone is also automatically synced to your PC. TextWand allows you to combine the experience of E-Mail, SMS and Chat tools all rolled into one. Some cool features are: Instant Messaging - Even when the app is closed. Sync to Phone - All messages are on your phone and PC.

Requirements:

Java Runtime Environment 1.6