From Second Life Wiki
Yeah I'm just normal.
Be happy, just a simple smile script.
Window Control, to change window opacity, helpful for buildings.
Listener Script, to listen to other people's conversations (like spying!)
Group key finder, for finding out the set group's key.
Give random object, gives a random object in the prim's inventory.
Go transparent when walking, an attachment that goes invisible when you walk, and visible when you don't walk.
Load URL, used for dialogs so you can visit the URL inside the script.
Drink script, mainly for food and drink in Second Life.
ALL these scripts are in the Script Library.