Isaenko Alexei

This plugin will disallow users manage them profile on the admin page. They will have to do that on the frontend page. 
Activate the plugin and it will create a profile page with a shortcode, and after that users will be redirected to that page if they would like to edit their profile. Also you able to use the shortcode on any page, just insert the shortcode – [oi_frontend_profile].
You are able to change profile page and hide Admin bar from a frontend.
Supported laguages:
<ul>
<li>English</li>
<li>Russian</li>
</ul>
This plugin will disallow users manage them profile on the admin page. They will have to do that on the frontend page. 
Activate the plugin and it creates the profile page with shortcode, and after that users will be redirected to this page if they will want to edit profile. Also you able to use the shortcode on any page, just insert the shortcode – [oi_frontend_profile].
In the next version of the plugin there will be an option page and you will be able to change profile page.
Supported laguages:
<ul>
<li>English</li>
<li>Russian</li>
</ul>
<h3>Oi Frontend Profile</h3>
Contributors: Isaenko Alexei 
Tags: profile, user, login, page, frontend, front-end 
Requires at least: 3.2 
Tested up to: 4.0 
Stable tag: 1.2 
License: GPLv2 or later 
License URI: http://www.gnu.org/licenses/gpl-2.0.html
This plugin disallow users going to the backend. They can manage theme profile on the frontend page.

Oi Frontend Profile

This plugin disallow users going to the backend. They can manage theme prifile on the frontend page.

Paolo

AyeCode

Stiofan

ReCaptcha addon for <a href="https://wordpress.org/plugins/userswp/" rel="ugc">UsersWP</a>.
The UsersWP ReCaptcha plugin allows you to implement a super security captcha into forms like 
registration, login forms. UsersWP Re-Captcha protects your site against spam, malicious registrations 
and other forms of attacks where computers try to disguise themselves as a human.
UsersWP Re-Captcha provides some of the smartest anti-spam security by protecting your site against spam and 
malicious registrations available today for WordPress.
<a href="https://www.google.com/recaptcha/" rel="nofollow ugc">Learn how reCAPTCHA works</a>
<h3>Requirements</h3>
<ul>
<li>You need the Google reCAPTCHA keys from <a href="https://www.google.com/recaptcha/admin#whyrecaptcha" rel="nofollow ugc">here</a>.</li>
</ul>

Oi Frontend Profile vs UsersWP – ReCaptcha