Please write the languages/platforms supported if the site doesn't allow every kind of scripts. Why you use it? Why is it a good source? Talk about the major weakness of the site.
I'm not sure that this is what you're looking for, but the closest thing I can think of would be Monitoring Exchange, which keeps scripts that enable admins to enhance their remote monitoring.
There's also a thread on HP's forums devoted to sysadmin scripts, but it's pretty old.
If you want tips on writing good scripts, my fellow blogger Bob Plankers wrote a column with great tips here.