Text messaging from Windows computer

[Ian Dyer]

What program do you recommend? Ideally, we'd like to respond to email and text messages in the same program. 

If that's not possible, at least we want to send texts from our computer, so we have a record and an ongoing thread of the conversation on our computer, like we do with email. 

Even better would be a program that lets us send, receive and reply to email, text and Facebook Messages.