Android mass sms sender

The goal here is to find a way to use those 1000 free sms I get each month and of which I don't make much use. The purpose here would be to find a tool to send a lot of sms at once.

Need to check:

• http://code.google.com/p/talkmyphone/ Control android phone through xmpp
• http://sent.ly/
• http://www.frontlinesms.com/ ← seems to be best response to the question