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This plugin allows you to add authentication using social media networks (Twitter, WordPress, Google+, etc.) for the users who want to comment on your blog. 
The plugin can be activated to provide authentication for all posts or only for selected posts. 
The usage of this plugin does not oblige you to create an account on our website, like others plugins do. 
All you need is to have an account (if you don’t have one, then you must create it) on the social network that you want to use as a source of authentication.
<h3>Configuration</h3>
To configure the plugin, you must follow the instructions described here: http://www.ixtendo.com/comments-with-social-login-wp-plugin/

Comments with Social Login

Add authentication using social media networks (Twitter, WordPress, Google+, etc.) for blog comments

Robin Cornett

Scriptless Social Sharing is a wee plugin to add buttons to your posts/pages, to make it easier for your readers to share your content on social networks.
The sharing links use the most basic methods provided by each network. There is no JavaScript, nothing fancy included in this plugin, so if you want fancy, this is not the plugin you’re looking for. It just builds a set of links.
The sharing buttons are accessible–even if you choose the “Icons Only” button styles, the network names are still part of the buttons, just hidden in an accessible-ready manner.
There is a small settings page, so you can make decisions about which content types should have sharing buttons and where, what buttons should be added, and whether or not to use the plugin’s styles. Beyond that, developers may like to make use of filters throughout the plugin.
Banner/icon image credit: <a href="https://gratisography.com/" rel="nofollow ugc">Ryan McGuire on Gratisography</a>.

Scriptless Social Sharing

This plugin adds super simple social sharing buttons to your content.

Comments with Social Login vs Scriptless Social Sharing