JSMS is a free open source application which lets you quickly send text messages to any mobile phone using your provider account without the need to open a web browser. JSMS is a reliable SMS application which you can leave open all the time on your Mac or PC to send the odd text (or many)!
“JSMS - 2 guys, spare time = great cross-platform app that works with 3 mobile networks and has *most* of the features of o2's messaging area and WORKS.”
from o2online.ie
JSMS supports over 20 different providers. All you need to get started is have (or set up) a free account with any of these providers:
