Ajax'd PHP Login, User Management & Site Security-UserBase_v1.2
UserBase is a powerful and full featured PHP user login and user management system with a huge number of extras that you may require when setting up a new website. Ajaxed front end with a noScript version and a fully ajaxed admin CP using delicious amounts of jQuery to make user management a pleasure. Did I mention it also fully supports Facebook, Twitter, Google+ and Yahoo user log-ins plus loads more?
Userbase also contains a built-in site traffic analytics system (siteStats) that allows you to easily track conversion rates on a range of metrics in real time – no more waiting around for 24 hours before getting your data.