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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

okapy

NextScripts

This plugin automatically publishes posts from your blog to your Social Media accounts such as Twitter, Blogger, Telegram, Tumblr, Flickr, LinkedIn, ok.ru, LiveJournal, DreamWidth, Flipboard, Google My Business, Line, Diigo, Instapaper, Pinterest, Plurk, VK.com (VKontakte), YouTube, Scoop.It, WordPress, XING etc. The whole process is completely automated. Just write a new post and either entire post or it’s nicely formatted announcement with backlink will be published to all your configured social networks. You can reach the most audience and tell all your friends, readers and followers about your new post. Plugin works with profiles, business pages, community pages, groups, etc. Messages are 100% customizable and adopted for each network requirements.
[Great News – July 2022] After almost 2 years break, plugin is back to active development and support. Versions 4.5 and 5.0 are coming soon…
<ul>
<li>Version 4.4 – fully compatible with WordPress 6 and Guttenberg Blocks.</li>
</ul>
<h4>Supported Networks</h4>
<ul>
<li>Blogger/Blogspot – Autopost to your blog. HTML is supported.</li>
<li>Deviantart.com – Autopost to your blog. HTML is supported.</li>
<li>Diigo – Auto-submit bookmark to your account. </li>
<li>Flickr – Autopost images to your photostream and/or sets. Tags are supported. </li>
<li>Flipboard (with third party API library) – post to your magazines.</li>
<li>Instapaper – Auto-submit bookmark to your account. </li>
<li>Google My Business (with third party API library) – Autopost to your Google My Business listings.</li>
<li>Line – Autopost to your channel, group or room.</li>
<li>LinkedIn – Autopost to your account. Ability to attach your blogpost to LinkedIn post. Autopost to LinkedIn Company pages and/or Groups (with third party API library)</li>
<li>LiveJournal – Auto-submit your blogpost to LiveJournal blog or community. “LiveJournal Engine” based website DreamWidth.org is also supported. </li>
<li>MailChimp – One of the most popular email marketing tools. You can send your blogs as email campaigns to specific subscribers.</li>
<li>Medium – Autopost to your profile or publications.</li>
<li>ok.ru (Odnoklassniki) Autopost to your group/page. Ability to make text posts, image posts, share links.</li>
<li>Pinterest (with third party API library) – Pin your blogpost’s featured image to your Pinterest board.</li>
<li>Reddit (with third party API library) – post to your subreddits.</li>
<li>Scoop.It (with third party API library) – Autopost to your “Topics”. Ability to attach your blogpost to scoop. Ability to make “Image” posts.</li>
<li>SETT – Auto-post to your Sett.com blog.</li>
<li>Telegram – Autopost to your channel, group or chat.</li>
<li>Tumblr – Autopost to your account. Ability to attach your blogpost to Tumblr post. HTML is supported.</li>
<li>Twitter – Autopost to your account. Ability to attach Image to tweets.</li>
<li>Plurk – Autopost to your account. Ability to attach Image to messages.</li>
<li>vBulletin – Auto-submit your blogpost to vBulletin forums. Could create new threads or new posts.</li>
<li>vk.com (vKontakte) – Autopost to your profile or group page. Ability to attach your blogpost to vk.com post. Ability to make “Image” posts.</li>
<li>Weibo – Biggest Chinese Microblogging Service. You can post your messages and images.</li>
<li>WordPress – Auto-submit your blogpost to another blog based on WordPress. This options includes WordPress.com, Blog.com, etc..</li>
<li>XING – Post text messages or share links.</li>
<li>YouTube (with third party API library) – Post messages to your YouTube channel feed. If blogpost has youtube reference it will be attached.</li>
<li>Yo – Send notifications to your subscribers.</li>
<li>500px – Autopost images to your account.</li>
</ul>
… more networks are coming soon …
<ul>
<li>(with third party API library) means that you need to eitgher provide your own API or have a <a href="https://www.nextscripts.com/snap-api-premium-for-wordpress/" rel="nofollow ugc">SNAP Premium API Library Addon for WordPress</a>. </li>
</ul>
Plugin makes 100% White Labeled Posts The main idea behind the plugin is to give you the ability to promote only yourself. Plugin uses your own apps and all posts to all networks come only from you. No “Shared via NextScripts.com” or “Posted by SNAP for WordPress” messages.
Please see <a href="https://www.nextscripts.com/installation-of-social-networks-auto-poster-for-wordpress/" rel="nofollow ugc">complete installation instructions with video and screenshots</a>
Free and Pro Plugin Features <a href="https://www.nextscripts.com/snap-features/" rel="nofollow ugc">Please see more detailed features list</a>
<ul>
<li><a href="https://www.nextscripts.com/snap-features/message-formatting-tags/" rel="nofollow ugc">Message Formatting Tags</a></li>
<li><a href="https://www.nextscripts.com/snap-features/filters/" rel="nofollow ugc">Filters</a>. Filters allow you to post only specified categories, tags, post types, etc… to each Social Network account.</li>
<li><a href="https://www.nextscripts.com/snap-features/reposter/" rel="nofollow ugc">Re-Poster</a>. Automatically post your already existing posts to your social media accounts.</li>
<li>Tags/Categories could be posted as Hashtags</li>
<li>Auto-import replies and mentions from and Twitter as WordPress Comments</li>
<li>URL Shorteners: bit.ly, goo.gl, YOURLS and built in WordPress URL Shortener</li>
<li>Additional URL Parameters </li>
<li>Custom URLs for AutoPosts </li>
<li>Export/Import Plugin settings</li>
<li>See direct links to the published posts from the “Edit” page</li>
<li>“Image” posts for VK and Twitter</li>
<li>Ability to “Spin” message post templates</li>
<li><a href="https://www.nextscripts.com/tutorials/how-to-post-woocommerce-products/" rel="nofollow ugc">Full compatibility with WooCommerce</a>. SNAP can autopost new or auto-repost existing products to all your social media accounts.</li>
</ul>
Some additional features could be added via addons <a href="https://www.nextscripts.net" rel="nofollow ugc">addons</a>
<ul>
<li>Unlimited accounts. Add/configure unlimited number of accounts for each social network.</li>
<li>Ability to make Scheduled and Delayed posts</li>
<li>Advanced Filters. Filter by Custom Fields, Custom Taxonomies, and Searches</li>
<li>Auto-repost existing posts randomly</li>
<li>Limit auto-reposting to specific days and times.</li>
<li>Import comments.</li>
<li>Use Proxies.</li>
</ul>
Requirements
WordPress 6.0+ (6.9+ is preferred) 
PHP 7.4+ (8.2+ is preferred) 
cURL 
Correctly working WP cron is required for some functionality (Scheduled posts, Auto reposter, Comments Import, etc…)
Get Support
<a href="https://www.nextscripts.com/support/" rel="nofollow ugc">Contact support/Open Support Ticket</a>
<h3>Other/Copyrights</h3>
Plugin Name: Next Scripts Social Networks Auto-Poster
Plugin URI: https://www.nextscripts.com/social-networks-auto-poster-for-wordpress
Description: This plugin automatically publishes posts from your blog to your Twitter, and Google+ profiles and/or pages.
Author: NextScripts
Author URL: https://www.nextscripts.com
Copyright 2012-2026 NextScripts Corp
PHP Twitter API: Copyright 2012 – themattharris – tmhOAuth
NextScripts Corp

NextScripts: Social Networks Auto-Poster

I had the pro version for years, but have discontinued it due to lack of support, my last ticket to them has been pending for months...

Used to be good, now won't work, no support

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Comments with Social Login vs NextScripts: Social Networks Auto-Poster