Casimir is an URL shortener that is simple to install and use. It lets the user set the desired short URL.
Dam.gd Shortened URL Generator is a system that creates shortened URLs. It was first developed for countycriminal.com and integrascan.com.
URL Shortening is an application to shorten your long URLs. It includes multilingual support (i18n).
Rails URL Shortener is a Ruby on Rails application to shorten your long URLs.
A high performance, scalable database modeled after Bigtable.
A utility that convert an email to a Trac ticket.