Apple is offering one of it's upcoming OS X Mountain Lion features, Messages as a free download for testing. The Messages app for OS X which is currently in beta can be downloaded from Apple and allows you to send unlimited free messages to anyone with a supported iPhone, iPod Touch, iPad or Mac.If you want to take a look at the Messages app for OS X, you can download it right now by using the link which follows
Apple continues to break the boundaries between their iOS and Mac devices, and we can only imagine that they have a similar goal to Microsoft in unifying their operating systems sometime down the line.