WebSMS is a nice alternative to send SMS from your carrier's web site. It automates all the boring stuff. It's easy as the cell phone: compose, click, sent!
It gives you one-click access to your mobile contacts from the Address Book. Use a different phone color for each one of your frequent contacts. It even supports CAPTCHA's.
Released under an open source license, it can be extended to support new carriers writing a plugin. A thoroughly commented template lets you create your own plugin in a minute.
WebSMS project is kindly hosted by Origo ETH Zurich. Join the mailing list to follow development, submit bug reports and suggest new features.
See the list of currently supported carriers
WebSMS is neither affiliated to nor endorsed by the supported carriers.