UsersWP Followers Addon GPL Overview:

With the Followers add-on for UsersWP, your WordPress website’s users will be able to follow each other, just like on Twitter.

When activated, this addon creates two tabs in User Profile.

Followers

List of users who follow the current profile owner.

Following

List of users followed by the current profile owner.

At the moment this is all this add-on does, but with the upcoming “Notifications” add-on, your users will start receiving notifications for any action made by users they follow on your website.

The “Followers” add-on for UsersWP is 100% translatable.