This site is a repository of the "art" (or artifacts may be a better word) from the commonly used "burndown" style charts. These are often used in Agile project management, but not necessarily.
You are encouraged to upload screenshots or photos of your burndown charts to share the shapes with the world.
This site came about as a result of Todd asking "I wonder if there is a gallery of common burndown chart shapes anywhere." and Rob saying "no" and me thinking "I could build that in a half hour." And then I did.