Ow.ly - Shorten links, measure traffic, and demonstrate social ROI right inside the Hootsuite dashboard.
GetLasso.co - The all-in-one affiliate marketing tool
YOURLS - YOURLS is a website that contains all the tools you need to create and launch your very own URL shortener. URL shorteners like bitly or TinyURL are fine for public use, but they offer limited options in terms of URL customization.
Affilimate - Track your affiliate links and commissions in a single dashboard and increase revenue with a data-driven strategy.
Polr - An open source URL shortener. A great non-profit and free alternative to bit.ly, TinyURL, or goo.gl.
Pretty Links - The easy way to customize Facebook link previews