For those looking for more options, Dub[1] is a matured open-source[2] link shortener with Analytics.
For not-so-large volumes of links, say for friends-family, and the occasional public links, you can run something off Github Pages[3] with their built-in Jekyll + Redirect-From Plugin[4]. If you do not want to, you do not even need to have the code run locally, just edit on Github. I run one to easily share links for the family and relatives (photos, that document link, along with the Rick-Roll Video).
Tip: If one wants to run an indie or personal or family/friends shortlink for easy sharing, try to have it on your own domain. This allowed me to moved between tools that powers it.