Registration of multiple user roles from different registration pages with Profile 2 module
Drupal got a great user registration system and management but it can be made awesome with Profile 2 and Profile 2 Registration Path modules.
Tutorials
Create related content block view based on terms in Drupal 7
Step by step guide on how to create block view with the related content list based on taxonomy terms associated with the current node.
Single Sign On - Drupal 7
A complete guide on how to configure Single Sign On (SSO) on a Drupal 7 site.
Unblock users with Views Bulk Operations (VBO) in Drupal 7
While creating the user's list in views, Views Bulk Operations (VBO) module gives the option to perform 'Block current users' operation but doesn't give any option to perform 'Unblock current user' operation. Here is the code snippet tutorial to add "Unblock users" option in Views Bulk Operations in views.