an App to replace the stock AppWidgetPicker(you know long press on the homescreen -> add -> widget) which groups the widgets by packages.So if you have a widget installed that has 3 different sizes, there is only one entry in the list and if you click it you can pick the size in a second dialog.
The main problem is that it needs to be installed on /system cause android will not grand the needed permission to any app installed on /data.
The APK is attached
The source can be found here
Its all released under Apache 2.0 license.