The image looks like it was posted on this page back in January. Here's the information translated by Google, so it may not be entirely correct:
Modules
"Another great feature that you will not lie, is quite forgotten now, which is already planned for some time. The modular system should allow developers to create their own "module" which then integrate into the client interface Dofus.
This new system could provide access to a large number of improvements, such as a module assistance for maging, a Notification Center, a management module mounts ... In short, the potential of modules to facilitate the lives of Dofusiens are huge!
Some images, for example, are available here.
This system is currently under development and could happen on Dofus sometime in the year 2013."
Apparently they've been in development on other servers for a long time (original announcement in French), but are scheduled to appear soon. If you're still interested, here's a youtube channel of some other interesting modules that are currently being tested. I would love to have some of those multi-accounting mods.