Are you tired of carriers (well, AT&T) charging you some insane monthly fee to get an unlimited amount of text messages? Well, Pinger’s TextFree Unlimited application might just be your answer.

TextFree is able to use a phone number or email address to get messages to and from iPhone to iPod Touch. Not only that, all the replies are free.

The developer says that TextFree is:

• The fastest and most reliable texting application
• Is able to notify you of texts even when you’re NOT in the app
• Able to assign a different tone to each friend
• Able to customize look and feel of chats/conversations
• Horizontal keyboards
• Emoticon support
• Supports many U.S. carriers