Pitabas

NetTantra

This plugin asks the user to choose his role in the website during registration from a list of selected roles. It works with BuddyPress also. It provides an interface from where the admin can choose which roles to display during registration for the user to choose from.
<h4>About the Developer</h4>
This Plugin is developed by NetTantra Technologies – a team of open-source enthusiasts and WordPress experts. NetTantra designers and developers work relentlessly to bring code to life so that WordPress users don’t have to do the hard work.
For professional support, you can get in touch with the NetTantra Team at <a href="mailto:wordpress@nettantra.com" rel="nofollow ugc">wordpress@nettantra.com</a>

WP Roles at Registration

This plugin asks the user to choose his role in the website during registration from a list of selected roles. Works with BuddyPress also.

Edem

Used Manage User Roles 
Add Custom User roles 
Add Capabilities to User roles 
Remove Capabilities from User roles 
View Users in a particular role 
Delete User Roles 
Clone User Roles

WP Roles at Registration vs CMC ROLE