SMS Mac comes in many flavors. A Dashboard Widget and an Address Book plug-in, a Sidebar Gadget and a Yahoo! Widget. Do you need to send an SMS from a script? SMS Mac also supports AppleScript. You decide which one works best for you. Or use all of them. The Address Book plug-in works with Mac OS X 10.3 and up (including Leopard). The Dashboard widget was developed especially for Tiger and Leopard, Apple's latest versions of Mac OS X. The Sidebar Gadget works with Windows Vista. The Yahoo! Widget works with Windows 2000 and up.
Easily send an SMS text message from your Address Book with the SMS Mac Address Book plug-in. Just open the Address Book card of your friend or contact, click the mobile label and choose the command Send SMS from the popup menu. You can also select a group of contacts and send an SMS to all members of the group!