UPDATE: EasyLogin – User Membership System
EasyLogin is a new script for User Membership: 
http://bit.ly/17Jhly2Account System Multi-Feature
Demo: http://demo.hazzardweb.net/login_system (use admin / admin for full acces)
Documentation: http://demo.hazzardweb.net/login_system/docs/ 
HazzardWeb offers a complete user management script with login, register, social authentificaion, recover password, activation email form and an Admin Panel. Also each user have a profile and can edit his profile settings. 
All forms are validated both with JavaScript and PHP.
Video: 
http://youtu.be/N5TE8Zfr23E Features:
- Login
 
- Signup
 
- Admin Panel for user managemet system
 
- Facebook, Twitter, Google Authentication
 
- Activation email
 
- Recover email
 
- Gravatar, Facebook, Twitter, Google+ Avatar
 
- Avatar Upload & Webcam Snapshot with Cropping
 
- Profile Page
 
- jQuery Validation
 
- Customizable PHP Account Class
 
- User meta for more options
 
- Send emails with server email
 
- Gmail integration for emails
 
- PHP Account Class with all you need for user managemet
 
- User meta functions to extending the script, add, update, get, delete
 
If you don’t have the latest version of this script send me a PM and I’ll send you the latest version.
Changelog
1.4.8
- Updates for the new Twitter API v1.1
 
- Added no PHPMailer option to send emails. Add $config[‘PHPMailer’] = FALSE; in account_config.php to disable PHPMailer
 
1.4.7
- Fixed avatar bug in Account Class
 
1.4.6
- Fixed jQuery imgareaselect plugin bug.
 
1.4.51.4.4
- Added a fix for mobile and tablets browsers where you can’t make a selection. Now a default selection will be made.
 
1.4.3
- Added option to upload avatar or to take a picture with the webcam + cropping option
 
- Account.class.php tweaks
 
- Admin users page fix for table
 
1.4.2  
- Added Admin Panel for user managemet: view user, edit, add, delete, send emails
 
- Fixes to the Account.class.php
 
- The links have been changed from /?account= to /?page= 
 
- Some other files have been modified
 
1.4.1 -  Added a small fix for reloading captcha image for IE 8,9,10 browser in assets/js/account.js 
 
1.4   -   Social links fixed in includes/accunt/profile.php