OTS Shortener is described as 'Shorten unlimited URLs for free, anonymously. There is no limit for links, and you don't need an account. You aren't tracked, 'cause we respect your privacy'. There are more than 100 alternatives to OTS Shortener, not only websites but also apps for a variety of platforms, including Windows, Linux, Mac and Self-Hosted solutions. The best alternative is Kutt, which is both free and Open Source. Other great sites and apps similar to OTS Shortener are bit.ly (Freemium), Polr (Free, Open Source), YOURLS (Free, Open Source) and Catbox (Free).
Shorten URLs from anywhere with bit.ly. Bit.ly allows users to shorten, share, and track links (URLs). Reducing the URL length makes sharing easier. Bit.ly is available as a website, as a bookmarklet, and as a robust and open API.
Anchr provides you with kind of a toolbox for tiny tasks on the internet. Currently you can upload and share pictures, shorten links for easier sharing and create link collections, which are like a bookmark list that is accessible from everywhere.
Earn money for each visitor to your shortened links with adf.ly! Use a URL shortening service that pays. adf.ly is a free URL shortening service with a twist: get paid to share your links on the Internet! Just register for an account and start shrinking.