Check out the list below:

1. The Awesome Highlighter: Highlight text on web pages
2. Ning: Lets you create and join new social networks for your interests and passions
3. The OpenLearn website: Gives free access to Open University course materials
4. Primo PDF: Create PDF files for free
5. Twitterfall: Set up tags to view twitter trends. Great to use at conferences or in classrooms   
6. Xtimeline: Creates your own timelines 
7. Zamzar: Free online file conversion
8. Wordle: Create beautiful word clouds
9. Spezify: Visual search
10. Visuwords: The online graphical dictionary and thesaurus 
11. bubbl.us: Mindmapping tool 
12. Skype-to-Skype calls: Low-cost international calls and a free iPhone app
13. IBM INNOV8 2.0: Resources for business
14. Wordpress: Get a free blog, 1000s of free graphic themes
15. Hot Potatoes Home Page – create interactive quizzes and puzzles
16. Welcome to Wikispaces: Free Wikis for everyone
17. FreeMind; Free mind mapping software 
18. Gliffy: Diagram software
19. Prezi: The zooming presentation editor  
20. Free PowerPoint to Flash converter 
21. Upload and share PowerPoint presentations and documents
22. Xtranormal: Create your movies
23. Riveting talks by remarkable people, free to the world
24. Animoto: The end of slideshows
25. Provide feedback on websites 
26. PhotoPeach: Free photo slideshows with music 
27. BigHugeLabs: Do fun stuff with your photos
28. Read The Words
29. OpenSim: Create your own virtual worlds 
30. Scratch: Create your own animations and games
31. Udutu: Online learning simulations made easy
32. Pageflakes
33. Online Meeting, web conferencing, desktop sharing and remote support with Mikogo 
34. Audacity: Free audio editor and recorder
35. Dosize: Resize digital photo images online
36. Google Sketch Up
37. OpenOffice.org: Free and open productivity suite
38. Go! Animate: Create your own cartoons and animations
39. Twitterfeed: Feed your RSS feed from your website to Twitter
40. Scribd: Upload any document to your website for  online viewing
    

---