CodeCanyon - Advanced PHP URL Shortener | 986 KB
Advanced PHP URL Shortener is a powerful clean & lightweight script that allows your visitors to shorten their urls, track the hits, and even more. Also comes with an API that allows developers to retrieve useful information such as shortened url, original url, hits, date/time, a sleek Metro design fully compatible Android, iPhone and Windows Phone handsets.
DEMO:
http://codecanyon.net/item/advanced-php-url-shortener/3450738