Here is my first Safari Extension ever, Scrollbars. It changes your default safari scrollbars by a thin iOS-like scrollbar. Really nice.
It uses CSS to modify the style of the page, removing the standard scrollbars and using instead the thin scrollbar generated by CSS. I have found it does not work correctly in some sites that have their own CSS style I guess. I'm not sure if there is any way to overwrite that, but if I find it I will update it.
Please go ahead and download it from this link:
All feedback is welcome!