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
AutoMsg - AutoMsg sends message automatically at set time. I will issuing an update for a the current version and a special version for Symbian phones soon. Till then keep checking.
Note (for Nokia 6230i users): N6230i has a bug in its Java platform
Simple J2ME application to send unlimited SMS anywhere in India for free. To use this application first create an account on way2sms.com and use your mobile number and password to send free SMS to Indian numbers. Also it required GPRS/EDGE connection
Challenge your friends to send strange sms to friends in your address book. Whoever sends the most wins. Invite friends with iPhone, Android or Java straight from the app. If you send a lot of sms, please check out Telias offer on Refill and Max 25