1. Drawing boards
   1. CoSketch
      1. free hand drawing, basic shapes, upload images
      2. No registration required
      3. Browser based, no plugins required. Very simple interface.
      4. chat box
      5. sharing is done manually, by sending people the URL
      6. drawing exportable as image
      7. functions to clear drawing, background, all
2. Sticky Notes
   1. Padlet
      1. Sticky note board
      2. Stickies can have text, images, photos from webcam
      3. Flash-based
      4. No registration needed
      5. Anonymous access can be password protected
      6. Sharing by email, sending URL
      7. Exportable to PDF, Excel and CSV (but includes only the text)
      8. No function to clear the board
   2. GroupZap
      1. Free (with restrictions)
      2. browser-based (HTML5)
      3. No registration required, but possible
      4. Participants don't need registration. Invitation by e-mail
      5. Boards can be zoomed in/out
      6. Colourful stickies, icons, arrows and boxes
      7. not very fast
      8. Exportable to PDF and PNG (as image)
      9. History view of changes, with replay
      10. No way to erase the board
   3. Scrumblr
      1. No registration required or even available
      2. To share, manually send the URL by e-mail
      3. open source (Github)
      4. It can be installed locally (Node.js)
      5. Index cards on whiteboard metaphor
      6. very simple interface. All changes are real time for everyone.
      7. No export function
3. Shared Documents
   1. google Docs
      1. Collaborate on documents like spreadsheets, text documents, presentations, etc.
      2. Google account required for all participants
      3. Sharing done by e-mail notification. Owner must send invites from site
      4. Chat function
   2. PiratePad
      1. No registration required (nor available.)
      2. Browser based
      3. Text sharing
      4. Time slider feature to see evolution of changes
      5. Save revision (snapshots) with restore
      6. Export to HTML, TXT (PDF not working)
      7. Chat window
      8. Authorship colours (to identify who wrote what)
      9. No way to delete the documents
4. Agile Specific
   1. Scrumy
      1. Free. Real-time update only in paid version
      2. Fixed columns: To Do/In Progress/Verify/Done
   2. Planning Poker
5. Other
   1. Popplet
      1. Registration required to create boards. No anonymous access
      2. Mind-map style diagrams, with connected nodes
      3. Sharing is done from the site, one user at a time, and seems buggy when inviting someone that isn't registered yet
      4. Users can't change their name
      5. Exportable to PDF and image
      6. Flash based
   2. Lean Coffee Table
6. Decision Making
   1. Dotstorming
      1. free w/registration
   2. Loomio
      1. Collective decision making
      2. free account (limited to 1 "group")
   3. Doodle
      1. Scheduling polls