Trello

Trello is a SCRUM like free online application.

Features

 * Free
 * Create your own list of actions, as many as you like
 * Receive email notifications: Instantly, Periodically, Never - https://trello.com/my/account
 * Activies/Notifications can be visualized, by visualizing the public JSON - e.g. https://trello.com/board/4f46dfd8251057f904f99550/ose-video.json
 * Add Deadlines
 * Add People
 * Add Colors
 * Add Comments
 * Upload files
 * Vote for an action
 * Active Developers
 * Has shortcuts: https://trello.com/shortcuts
 * You can move cards between Boards!

Features to come soon

 * Subscribe to changes (In Progress): https://trello.com/card/subscribe/4d5ea62fd76aa1136000000c/1049
 * Android & iOS support: http://blog.fogcreek.com/building-trello-com-for-multiple-devices/, https://www.facebook.com/photo.php?fbid=262533550494109&set=a.193811744032957.49301.180047058742759&type=1 , itunes.com/apps/trello
 * REST API - https://trello.com/card/run-web-client-on-rest-api-v1/4d5ea62fd76aa1136000000c/1145
 * Card Time Tracking as a plugin: https://trello.com/card/time-tracking/4d5ea62fd76aa1136000000c/1054

Disadvantages

 * No Burndown Charts

Examples

 * Trello Board: https://trello.com/board/trello-development/4d5ea62fd76aa1136000000c
 * OSE Video Board: https://trello.com/board/ose-video/4f46dfd8251057f904f99550

Collaboration Usage
These are guidelines how to use Trello collaboratively:
 * Create needed Lists, e.g.: TODO, Doing, Verification, Done.
 * Create new cards:
 * Press "N" to create a new card. It will be created below the current selected card. Type the name of the card and press "Enter" to save it.
 * Assign yourself/another to a card
 * Assign yourself to a card - select the card and press "SPACE"
 * Assign another to a card - select the card and press "a" and choose the person.
 * Unassigning works with the same shortcuts.
 * Verification
 * Add card for Verification
 * Add the card in the "Verification" list and assign the person, if not already assigned, to verify it (press "A" and choose the person).
 * Send email to the person with subject "Verify " and in the body link to the card (e.g. https://trello.com/card/animating-low-cost-explanation-sasha/4f46dfd8251057f904f99550/94)
 * Verify a card
 * If all okay, move it to the list "Done"
 * If more work is to be done:
 * Create a checklist and the points that has to be done
 * Move the card back to "TODO" or "Doing"
 * Send email to the person responsible with subject "TODO " or "Doing " and in the body link to the card. He should read your checklist points and fix them.
 * View more cards by decreasing the font size from your browser.