Record a sketch with or without voice. Explain something, have fun, or create art. Then embed the sketch player in your blog or point people to your sketch channel.
Ever read one of those top ten lists or photo galleries where every item is on a different page? You spend more time clicking "Next" and waiting than actually reading anything. PageZipper is a free bookmarklet which automatically merges all the "Next" pages into one, so you can skip directly to the stuff you want.
With Image Loop you can easily create fun slideshows with your choice of effects, skins, and backgrounds. Upload images from social networking sites or your personal picture library.
The Hot Potatoes suite includes six applications, enabling you to create interactive multiple-choice, short-answer, jumbled-sentence, crossword, matching/ordering and gap-fill exercises for the World Wide Web. Hot Potatoes is not freeware, but it is free of charge for those working for publicly-funded non-profit-making educational institutions, who make their pages available on the web.
One of the things that I really like about Hot Potatoes is it's seemless integration with certain Learning Management Systems. I use Moodle quite a bit, and you can include a Hot Potatoes activity right in the Moodle course.
30 Boxes is an online calendar that works great for students due to its simplicity and sharing options. It features RSS subscription to automatically populate the calendar with feed items. Users can even access their calendars on the go.
Gliffy allows students to draw and share diagrams online. You get all of your basic functionality that you would in an offline diagram application but with a few extra bonuses like working online collaboratively and dynamic publishing of diagrams. Create flow charts, floor plans, technical diagrams, and more.
Online conversions for different kind of metrics such as length, weight, temperature, area, volume, speed, frequency, light, cooking, currency. With pictures to allow more easy access the menu items and some explanations.