Sending Sms Free Of Charge Via Gprs

Hello guys I'd like to know if there are any java application one can use to send message free of charge via gprs. Please if you know any and how to get them do post. Thankx

have you tried cellity and it works- sends and delivers. i've tried cellity, crickee, freesms, smsplanet from getjar each with 1 wahala or another. still looking for a good one that works. infact i had wanted to post this topic.
thanks.