This is not actually plugin, but base class you can use to extend and create your own plugin. Along with the base class, you have a Wizard for creating plugins using base class. Wizard itself is created using bas class.

Here is the list of features that are currently implemented:

• multi instance widget support
• multilanguage support
• various filters and actions
• adding unlimited number of external files (css, js…)
• options panele on admin pages
• activity logging
• dump to file of event, strings and object
• creating valid html form elements (hiddn input)

Wordpress PlugIn Page…

GD Plugin Core @ Wordpress.org