Another great features allows by wordpress is to display recently registered users with your site.
If you allow your user to registered with your site than you can also display how many users registered recently.You can do this with a plugins called “Display Recently Registered Users” and can customize on your own way.
Display Recently Registered Users is a widget that lets you display the N most recently registered users on your WordPress site.
What you can do with “Display Recently Registered Users” Plugins:
You can customize size of gravator.
You can customize Date format.
You can customize Number of user to display.
Final result in sidebar widget: