Ask HK: Is there a good SDK for developer keys?

I want to add a developer API to a project. You know, where someone provides their userid and/or email address and gets a developer key and a secret. My choice are to roll my own, steal one from an existing project, or find an add-in/module. Any of Perl/Python/PHP will do. Unfortunately, I can't think of any search terms that don't return a crap-load of other people's developer key request pages.