SendSMS is a program which allows you to send a message to anybody who has an American telephone number. SendSMS is the simplest way to send text messages online and allows you to send 75 free text messages per day straight from your desktop.

SendSMS lets you send 75 free text messages per day straight from your desktop. Moreover this app is useful if you need to send a quick text without leaving your Mac, but you cannot receive messages that are sent in reply. The sent message can be received from anybody who has an American phone number and can be used for sending SMS from all over the world.

SendSMS is compatible with major telephone operators including:
AT&T Wireless;
Verizon;
Sprint PCS;
T – Mobile

Requirements:
OS X 10.6-10.8
64-bit Intel Required