I need a web applications where from several people in my office can send text message to different cell phone carriers in USA. I want to be able to send a message back to website to the person who sent me the message. Messaging within the users online from website to website will be needed too.
I host my website on godaddy so the prorgamming should be compatible with there webshosting.
It needs to be secure messaging as much as possible and users need to sign up before they can send /recieve messaging.