SMSSender simplifies the procedure of sending sms via websites as of your mobile phone company. It manages the login process for you and stores your address book locally on your computer. So you can reuse it for multiple gateways. Contact groups and alias names for your contacts gives more flexibility and makes you sending a message even faster. The sms length as well as the recipient count are not limited. Splitting the message in several sms is the work for the program.
Once set up, you are able to send sms within seconds and without the need of tons of clicks on a website. Enjoy.