Mrs. Kimball's Shelfari Widget
This list below abbreviated from a blog post. The full post has many more widgets and explanation of how to add the widgets to a blog.
Flickr Slideshow and Badges - Easily add photos from your flickr account to your sidebar.
YouTube - Place in YouTube channels or top trending videos.
Google Translate – Instantly translate your blog into many different languages.
Shelfari - Show off your favorite books for others to see.
Education Atlas – Free thesaurus and dictionary widget with many features.
Science & Math
Science Score – A science question of the day. Students can even enter to win prizes.
Wolfram Alpha – Quite possibly the best resource on this list – Wolfram Alpha contains hundreds of customizable math and science widgets, including unit converters, weather tools, graphing calculators, problem solvers, and much more. This might be the only resource math and science students and teachers need for their blogs!
Info Please – Nice looking “this day in history” widget that displays multiple events and updates every day.
Timeline Index – 30 different timelines showcasing several different periods of history – including US presidents, world history outline, philosophers, and explorers.
Voki - Add a speaking and highly customizable avatar to your blog. Record you voice, create a character, and much more!
Sweet Search – Place a search box for a trusted and safe for students search engine.
Google Maps – Embed a Google map – complete with directions, street views, and more.
Google Gadgets – Choose from hundreds of different widgets, including games, trivia and more.
Widget Sites & Collections
WidgetBox.com –The definite go-to place to find and build your own widgets. Edublogs uses several widgets from here on our main site!