Short URL Cloaking Service. Features:
* Easy to handle your long URLs.
* You can cloak your affiliate links, "buy it now!" URLs and track clicks.
* You get redirects (clicks) statistic: timing, referring sites, IP addresses;
* Easy marketing: your visitors' country, ZIP, refering pages.
* Set temporary download links and protect them with password.
* More privacy - hide your URLs from search engines and bots.
* Service is free to use and you don't have to register to use all of it's functionality (except URLs editing).

Update: After author announced the operations close later this year, I was reluctant for some time to use their services. However, the site survived and operational as usual. Rating increase from 4 to 5.

It's linkSlash =) Redirects statistics making this service unique.