Wext Messenger Wext is a free text messenger over the internet. It works on smartphones AND non-smartphones!
Edumid FunSMS Edumid FunSMS is a mobile software that allows users to send and receive sounds, smileys, vibrations and flashlight effects using ordinary SMS. All messages reside in the password protected FunSMS application and not in the usual phone Inbox or Sent items making sure that no one ever reads your secret messages and even more secret contacts
Trillian (BlackBerry) Trillian helps you organize and stay in touch with your IM and social friends while on-the-go. Receive instant push notifications, send pictures and messages, and optionally synchronize with Trillian for Mac, Windows, iPhone and Web
Funny SMS by SM Now use pre-saved Funny SMS to send your friends. No need to type, no need to search,
j-TXT j-TXT - An open source Java application to send free text messages with your mobile phone.
How does it work?
Data is sent over the GPRS net instead of the telecommunications SMS network.
This makes it a lot cheaper as you only pay for the Internet charges that you are covered by your provider