Two samples :
"CreategroupThis free script was written to help to organize your models in the sceneeditor. If you are working with very much objects, you can put them into "groups" with this script (+ a few more options). This can make your navigation in the sceneeditor more comfortable.
Layers2objectsLayers2objects saves every single layer of your model as an object with the same name + layernumber"
...and many more