This is a simple jquery/PHP/MYSQL user login and registration script which is simple and easy to intergrate into any website. It has the following features:

-user registration form with seamless error messages appearing without page reload
-user login page with remember me? feature for upto 7200 seconds (can be adjusted)
-Password reset
-secure script that prevents from hacking attacks
-encrypted user passwords
-well documented code for easy understanding of how the script works
-has a help.txt file that explains how to add/manage/install the script
-easy to add additional fields to the registration page

A demo can be found on the following link:
https://www.tradebit.com

Login details:
username: user1
password: pass1

It requires the following server specs:

-Server running on LINUX
-For testing purposes, you can use WAMP, XAMPP etc
-PHP version 5 and above
-MYSQL version 5 and above

More information can be found in the help.txt file of the script.