List of Most Helpful Free Web2.0 Sites for Small Businesses...

I wanted to start a thread to get a list of the MOST HELPFUL free web2.0 sites out there for small businesses. I know of a few (and I'll start the list), but please add on (especially lesser known sites that you think could be helpful). I'm curious to see what's out there. Please list the site and a BRIEF description of what it does/how it's useful.


NumSum - Create, collaborate and share web based spreadsheets. Eliminate the hassle of updating, re-emailing and re-saving spreadsheets...just save one to the web and let everyone work on it in real time!

DealLauncher - Create a free webpage about your latest special or sale, load in your email list and the site will send out a link to your new page to everyone on your list...eliminate printing costs and still professionally promote your specials!

XDrive - Free 5gb of online storage for files...you can upload and share them with your clients/customers and employees...eliminate all the annoying emails that clog up inboxes and provide easy access to important documents and files.