You have so many features using this URL shortener. You also don't need to register to use all feature. Best is to configure your shurt URL with a passwort or set a limit how often it can be called. So you have a very good protection to it.
Monitor Backlinks - Easy Link Management - SEO Tool for automatically checking your backlinks.
shorturl.is - Make long url's short. Statistics included!
Topvisor - All in one SEO and PPC tools for better marketing.
Capsulink - Capsulink is a URL shortener that gives you the key tools you need to optimize your content and marketing strategies.
Botify - Traffic Managers, SEO Managers, Webmasters:Crawl your site to extract all of its metadata and identify areas for improvement
ShrtFly - ShrtFly is one of the best URL shorteners, They offer Higher Payout Rates on Norway and United States Country.