XWindows Dock Plugin Manager is a small manager that adds extra functions to XWindows Dock – namely the ability to check your Gmail account.
There aren’t actually many plug-ins available with XWindows Dock Plugin Manager, but the Gmail checker and extra Container are pretty good, and there’s always the possibility that more plug-ins will be developed in the future – although more than likely you’ll have to download these separately.
Right-clicking on the Gmail icon and choosing Change Account will bring up a window where you can log in – although XWindows Dock Plugin Manager doesn't support multiple accounts. Container is a nice feature which allows you to place any folder on the dock. When you click, you’ll get an easy-to-view fan of the items that folder contains, but this feature is already available as standard in XWindows Dock.
As things stand now, XWindows Dock Plugin Manager just adds access to Gmail from your XWindows Dock.