1. Online OCR — Convert scanned documents to text.
  2. Wordle — Word clouds! (example) See also Tagxedo
  3. Up-Goer Five Text Editor— Can you explain a hard idea using only the ten hundred most used words?
  4. Scribd — Document sharing. (example)
  5. WordPress.com — Blogging platform.
  6. Edublogs — Like WordPress.com or Blogger but specifically tailored to educational needs.
  7. Wikipedia — "a collaboratively edited, multilingual, free Internet encyclopedia"
  8. NolaWiki — "a collaborative, reliable, comprehensive look at the people, places, events and ideas of the city of New Orleans."
  9. Wikispaces — Create your own wiki. (Note: This page is hosted on Wikispaces.)
  10. Google Sites — Create your own website/wiki. (example)

  11. visualizing.org — Find (and share) visualizations of complex issues. (example)
  12. Many Eyes — Find and create data visualizations. (example)
  13. Pinterest — A social environment for collecting, discovering and sharing images. (example) (more on educational use)
  14. Compfight — Search tool that makes it easy to find Flickr photos, including those licensed for re-use.

  15. YouTube — Everybody knows about YouTube, but did you know about their Education Channel?
  16. Vimeo — Video hosting. Like YouTube but cooler. Lack of support for captioning could be a deal-breaker.
  17. CaptionTube — Speaking of which, here's a tool for captioning YouTube videos. (example)
  18. TED-Ed — Like YouTube's Education Channel but even more highly curated.
  19. Animoto — Easy-to-make online videos from photos and music. Free for videos under 30 seconds. (example)
  20. Screenr — Screen recording. Yes, it's web-based. (example)
  21. SoundCloud — Audio sharing platform. Free version limited to 120 minutes total. (example)
  22. AudioBoo — Audio sharing platform. Free version limited to three minutes per file. (example)

  23. Educreations — Recordable interactive whiteboard. Captures voice and handwriting/drawing to produce movies. Especially nice with an iPad but can also be used via web browser. (example)
  24. Prezi — Make (and find) crazy zooming presentations. (example)
  25. Timetoast — Build (and find) interactive timelines. (example)
  26. Capzles — Make (and find) multimedia storylines. Educational version in the works. (example)
  27. SlideShare — Share and find presentations (mainly PowerPoint). (example)
  28. VoiceThread — "A VoiceThread is a collaborative, interactive, multimedia slide show that holds images, documents, and videos." (example)
  29. MentorMob — Make and find learning playlists. Virtually all media supported: videos, PDFs, webpages, etc. (example)

  30. Quora — Social Q&A site. There are many of these but Quora's the best. (example)
  31. Khan Academy — Lectures and quizzes with an emphasis on math, science and finance. (example)
  32. Poll Everywhere — Easy way to aggregate live responses. (example) (example) (see also Socrative)
  33. SurveyMonkey — Surveys made easy.
  34. Moodle — Free course-management system.
  35. Quizlet — Make and find study tools (flash cards etc.) (example)

  36. Evernote — Store notes, images, documents, web clips, audio notes. Searchable. Sync across your devices. Claims to recognize handwriting from, say, a photo of a whiteboard.
  37. LiveBinder — Like a three-ring binder for web pages. (example)
  38. Delivr — Make and manage QR codes. (example)

  39. Facebook — Yes, it can be used for teaching. For example, make a group for your class.
  40. Twitter — For developing connections with colleagues around the world.
  41. LinkedIn — Professional networking.
  42. Yammer — Enterprise social network: social software designed for the institutional context.
  43. Dropbox — Easy file sharing.

  44. Popplet — Mind mapping, image galleries, more. (example)
  45. MindMeister — Collaborative mind mapping. (example)
  46. Voki — Create talking avatars. See example below. (example)
  47. MakeBeliefComix — Create your own comic strips. You'll have to make a screenshot for sharing online. (example)
  48. Diigo — Bookmarks on steroids. Allows you to highlight and add sticky notes to web pages. (example)
  49. ScoopIt — Curated web content. (example)
  50. Learnist — Curated web content, possibly more education-oriented. (example)

See also: The Centre for Learning & Performance Technologies' Top 100 Tools for Learning