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...

Free voicemail, accessible via the web, for anyone with a US area code. They've also got widgets you can place on your blog, social network page, website, whatever that enable your visitors to leave you messages following customised greetings.

"Yugma is a free web conferencing service that enables people to instantly connect over the internet and to collaborate using any application or software, using both Windows and Mac. Businesses can connect on-demand and real-time with clients, prospects or employees whether they are across the city, nation or even the globe."

A sleek, free group text messaging service. Sign up, build your customer lists, and send text message campaigns instantly.

"Jyngle is a free voice and text messaging service that helps you easily share information with groups of people. Use the Web site or your phone to send messages to your social groups. Jyngle is perfect for friends, businesses, sports teams and organizations who need to send: event reminders, announcing meeting changes, party invitations, game and practice cancellations."