This plug-in allows you to select for opening from a list closed projects. I don't know about you but I keep my closed projects filtered out of Package Explorer to keep it clutter free.
The above filter dialog can be shown by clicking on the Filters menu item in Package Explorer view's drop down menu. Similarly the Project Explorer view has the Customize View menu item in it's dropdown view.
However just to open the closed projects I do not want to remove the filter. Hence this plug-in. Click on Open Closed Projects menu item in File menu or Package Explorer popup menu. It will show the following dialog with the list of closed projects. Select the projects you want to open and click OK. Those projects will be opened.
Install it from this update site: