1. List the websites that uses OpenID and explain how they implemented the system. (min. of 10 websites)

- Skitch.com - A Web service that gives you 1-click uploading of images for fast image sharing. - PBWiki - Create a free wiki using your OpenID. It's as easy as making a peanut butter sandwich. - LiveJournal - One of the first blogging platforms. - Drupal - The official website of Drupal, an open source content management platform. - Mixx - The well-known news site. - 37Signals - Simple software to help you get organized. Basecamp, Highrise, and Backpack are all OpenID enabled. - Foodio54 - Has a database of over half a million restaurants with reviews. - ToodLedo - An easy to use Web-based to-do list. - WetPaint - A popular wiki host. - Grou.ps- Allows you to create sharing platforms for your social groups - Jyte - Allows you to make claims about yourself and your friends, give and receive cred and manage your contacts and groups.