arlequin is a plugin for the open-source web publishing software called Dotclear.
Allows visitors choose a theme.
First install arlequin, manualy from a zip package or from Dotaddict repository. (See Dotclear's documentation to know how do this)
You can manage arlequin from blog admin sidebar menu ''Arlequin'' on sidebar or you can add dashboard icon, you should also add widget to allow visitor to select a theme.
You are welcome to contribute to this code.