Brian Fegter

ESMS message your readers and broadcast a new post to user cell phones. User group organization. Add custom carriers. This plugin is great for organizations or churches to stay in touch with their employees, volunteers, or constituents.
Features:
<ul>
<li>Owner Verification of cell phones with unsubscribe feature</li>
<li>AJAX sidebar widget form with custom title and terms of agreement.</li>
<li>Subscriber groups</li>
<li>Track how many SMS message have been sent to each subscriber.</li>
<li>Auto-notification of new posts to subscribers (optional)</li>
<li>Custom text messages from admins only</li>
<li>Message preview before sending SMS</li>
<li>80 default carriers</li>
<li>Delete/Add/Edit and Carriers</li>
<li>Most international carriers supported!</li>
<li>Edit/Delete Subscribers</li>
<li>WP Administration compatible interface.</li>
<li>Stats snapshot on dashboard.</li>
<li>New subscriber notification. (optional)</li>
<li>Embeddable Form using [easysms] on any post or page.</li>
</ul>
Future Features:
<ul>
<li>Personalized SMS messages.</li>
<li>Public groups.</li>
<li>Manually confirm numbers.</li>
<li>Bulk actions for carriers and subscribers.</li>
</ul>
Changelog:
<ul>
<li>10/10/09 – Widget upgraded to WP 2.8 Widget API and combined in original plugin. Widget TOS depracated due to public request.</li>
<li>6/10/09 – Post publish fixed for auto SMS only on publish, not on update.</li>
<li>1/13/09 – AJAX fixed for all platforms. Post publish fixed.</li>
<li>12/23/08 – Fixed AJAX form to work on WP not hosted in root.</li>
<li>12/23/08 – Fixed CSS bugs. Added Style tab to edit CSS from WP admin panel.</li>
<li>12/21/08 – Added AJAX sidebar widget and embed form. Hide terms of use option.</li>
<li>12/12/08 – Rearranged entire interface with EasySMS as its own tab. Added groups feature. Added Carrier/Groups/Subscriber tables for easy editing adding, and deleting. Created a sidebar widget form. Conversion function to convert previously registered subscribers to new easysms db table.</li>
<li>11/04/08 – Moved the message center to the “Write” tab and the subscription to the profile tab. Fixed logout bug.</li>
</ul>
Copyright 2008 <a href="http://www.misternifty.com/easysms/" title="Mister Nifty" rel="nofollow ugc">Mister Nifty</a>

EasySMS

EasySMS provides an easy way for readers to subscribe to SMS updates and for admins to send SMS messages to groups. Auto SMS with post publishing.

suhas93

This plugin will send comment notifications via SMS / text messages. This is powered by the txtweb.com APIs.
To set it up, 
SMS “@comment” (without quotes) to 
“9243342000” [India] 
“650 385 8882” or “898932” [US or Canada]
to acquire this Identifier code.
Go to WordPress Dashboard –> Settings –> Comment Notifications via SMS and set the code.
PS: If you have any other ideas for an SMS based plugin and want to share it, <a href="http://suhastech.com/" rel="nofollow ugc">contact me</a>

Comment Notifications via SMS

This plugin will send comment notifications via SMS / text messages.

EasySMS vs Comment Notifications via SMS