This is an open source URL shortener service that allows users to specify how many times a shortened URL may be used, and specify the shortened URL's expiration time. (You can make it only live for 5 minutes with 999999 uses, or for several years with only 1 use. The flexibility is yours.) Also supports password-based encryption of the destination URL.
Don't trust my server? Feel free to download and audit the source code and run your own server.
(I'm not 100% sure that there's not a more appropriate place to put this, but it's relevant to Crypto culture and uses cryptography.)