PaniniHindi - International award winning software to type SMS in Hindi very fast using only one key press for each character you type. It does not need Hindi characters printed on your keypad. Download and type in Hindi faster than you type in English.
Yoober Yoober lets you send free text messages from your mobile, without paying for SMS. You can send individual OR group messages locally & internationally, with no character limits to your message. Yoober is a completely FREE program
LiMIM Lightweight Mobile Instant Messenger is a Java platform-independent software to allow instant messaging between Mobile Phones and PCs
SMS 2 Reliance This version is only for RELIANCE users. If you are still living in the black & white world, then its time to add fun to ur SMS with Colours & Smileys
Messaging platform OTAM helps you to send free message anywhere in the world over gprs. Messages can be sent / received from computer as well. More over you can backup your contacts so u need not worry about loosing important contacts