Which authentication library would be good for me?

[eluser]Jason Stanley[/eluser]
Any reason why you just don't use Wordpress?

There is always PyroCMS. To be honest though if I am making a basic site without any site specific requirements I usually punt for Wordpress. It is only when I need site specific functionality that I look a Codeigniter and a custom coded option.

Why Wordpress? I really like the content editing / media manager. Take's a lot of time to get it working as nicely as that and a lot of smaller projects simply don't have have it.