Apple just released OS X 10.4.2 that includes a Widget Manager. There has been some criticism because there was no way to deactivate or deinstall a widget from the Dashboard or another GUI tool. Apple now introduces the Widget Manager to address these issues.
The Widget Manager is Widget itself. You can use it like any other Widget by clicking on it or dragging it to the Dashboard. Further there is now a new button besides the ”+” button for the Widget Board.
The Widget Manager will list every installed Widget (System and user installed in ~/Library/Widgets) and will show you if it is an Apple shipped one or not. 3rd party Widget are marked by a red sign. Further you can deactivate each Widget.
3rd party Widgets can be deinstalled by clicking on the red graphic:
UPDATE:
If you double-click on a new downloaded Widget, you are asked if you want to install it:
When the Widget starts you are asked if you want to keep or delete it.
