WhatsApp Messenger WhatsApp Messengeris a messaging app which allows you to exchange messages with your contacts without having to pay for SMS
Secret Agent The " Secret Agent " application, allows you to send Morse code encrypted SMS to your friends, and let them decipher what you wrote!
SMSBackUp Backup all your SMS ordered by name or number
SILC SILC (Secure Internet Live Conferencing) is a protocol which provides secure conferencing services in the Internet. It can be used to send any kind of messages, in addition to normal text messages
SmsShorter SmsShorter can be used to shorten text messages before sending