The SMS Server Tools 3 is a SMS Gateway software which can send and receive short messages through GSM modems and mobile phones.
Talkonautâ„¢ is free mobile calling, VoIP enabled, Google Talkâ„¢ like application for your mobile phone.Talkonautâ„¢ supports Jabber
TwitterMoko is a simple client for Twitter http://www.twitter.com. Now support http://identi.ca too