http://www.polyvore.com is an excellent web app that allows you to create mood boards, fashion sets and various compositions. this is a brief tutorial on how to do that.
(please excuse the mouse disappearing half way through the video)
Keyboard shortcuts work:
Center Image = C
Undo = CTRL+Z
Redo = CTRL+Y
Move with arrow keys, hold shift to move bigger space.
(comment below if you know any more)
Links:
Finished Product: http://www.polyvore.com/cgi/set?id=60250808
Designer of the original set: http://www.alexaliss.com
Support my by visiting: http://www.thealika.com