Check out the list below:

1   The Awesome Highlighter: Highlight text on web pages2   Ning: Lets you create and join new social networks for your interests and passions3   The OpenLearn website: Gives free access to Open University course materials4   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 conversion8   Wordle: Create beautiful word clouds 9   Spezify: Visual search10   Visuwords: The online graphical dictionary and thesaurus  11   bubbl.us: Mindmapping tool  12   Free Skype-to-Skype calls: Low-cost international calls and a free iPhone app13   IBM INNOV8 2.0: Resources for business14   Wordpress: Get a free blog, 1000s of free graphic themes15   Hot Potatoes Home Page – create interactive quizzes and puzzles16   Welcome to Wikispaces: Free Wikis for everyone17   FreeMind; Free mind mapping software  18   Gliffy: Diagram software19   Prezi: The zooming presentation editor   20   Free PowerPoint to Flash converter  21   Upload and share PowerPoint presentations and documents22   Xtranormal: Create your movies   23   Riveting talks by remarkable people, free to the world24   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 Words29   OpenSim: Create your own virtual worlds  30   Scratch: Create your own animations and games31   Udutu: Online learning simulations made easy32   SurveyMonkey.com: Powerful tool for creating web surveys. Online survey software made easy!   33   Create free online surveys and polls with PollDaddy.com34   Pageflakes35   Online Meeting, web conferencing, desktop sharing and remote support with Mikogo  36   Audacity: Free audio editor and recorder 37   Dosize: Resize digital photo images online38   Google Sketch Up39   OpenOffice.org: Free and open productivity suite40   Go! Animate: Create your own cartoons and animations