Send an automated response that you specify or is retrieved from a web page when users text your keyword to 41411. Let users subscribe to receive your text alerts on their phones. Very cool, free service but currently only limited U.S availability. Widgets available too...

iWEBTOOL Thumbnails is a free service allowing websites to include thumbnail previews of their links.

Odiogo is a web 2.0 application that allows users to create audio media from text content. Your site's RSS feeds, text articles and blog posts can be converted automatically to iPod-ready audio files ready to download and play anywhere, anytime, on any device - MP3 players, PDA's, cell phones and laptops.

As exhibited on this site, "Snap Preview Anywhere adds value to your site by powering it with the largest library of high quality site previews... for any link on your site for free!" Place your mouse over this for a demo.

A lightweight Open Source library that allows you to easily create very cool demo site tours online. There's also an Amberjack Drupal module.