The rendertimer skinobject is actually a quite simple skinobject. As you can see below this page, it renders the text showing the time it took to render the page.
The text has been set in a resourcefile, which makes it adjustable per portal and localisable at the same time.
Furthermore: it has been writen in C#. The compiled version of the skinobject is available as a PA is for registered users on this site. It's FREE !!!
To the downloads.