Wallwisher

Wallwisher is a tool that uses virtual sticky notes to pass on messages or create feedback.

Walls can be public or private.
 * Anyone can add a message to a public wall
 * Private wall messages can be added by invited friends and need to be approved by the wall creator.

Here is an example of a wall:

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Walls are easy to set up:

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Messages that are added can include links to videos, photos, etc.