Mark (podz)

With the SocialMyBlog widget you can easily add social buttons to the sidebar of your blog, and all with one simple widget for all the main social sites, this widget supports many different social sites allowing users to share your blog with thousands of people.

SocialMyBlog

A simple and easily adjustable social plugin for your blog to help you reach more visitors, includes facebook, google+, twitter, pinterest and more.

phpaddicted

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Best <a href="http://php-freelancer.in/wp-ajax-social-wordpress-social-plugin-to-load-social-buttonswidgets-via-ajax-to-reduce-loading-time-of-site/" rel="nofollow ugc">WordPress Social plugin</a> available in market.
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This plugin load social icons(facebook, twitter, Google Plus ) by Ajax(load facebook like and recommend, Twitter Share and Google plus share asynchronously).
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So by default all social code not loaded on website, instead of this it will show one icon (uploaded by you) for each social network and by clicking that icon it will load all code of facebook, Twitter, and google plus.
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What is benefit of this plugin? 
Google is considering site speed a important factor in search ranking algorithm, So when you directly use facebook,twitter, google plus like and share buttons they all load lots of scripts with it each time which takes time and that time added to site loading time and it effects to your site loading speed. You can read here about using site speed in web search ranking.
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If you use facebook, twitter and googleplus then all will be load scripts while loading page and it will take time to load page, If you use this plugin it will load a single small png(selected by you) for facebook, Twitter and Google plus which will not take too much time to load and when you click on that icon it will load like and share buttons asynchronously.
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This plugin have option to select social icons automatically after posts or before posts.
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If you do not want to show then automatically after or before posts there is one function which you can put anywhere in file to show social icons.
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Option to select show facebook, twitter or googleplus or not.
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Facebook, twitter and google plus all have different options to select which type of like and share button you want to show in your website.
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New mouse hover event, So you can set from admin that you want to load social widgets/button on mouse click or on mouse hover.
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For Each social network you can upload custom icon.
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This plugin is also SEO friendly.
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Ajax Based Admin Options.
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<h4>Major Features</h4>
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Load facebook like and recommend, Twitter Share and Google plus share asynchronously
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Reduce time of site speed.
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option to select social icons automatically after posts or before posts.
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option to place social icons manually.
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Option to select show facebook, twitter or googleplus or not.
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Different options to select which type of like and share button you want to show in your website.
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Ajax Based Admin Options.
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Use custom icon for each social network.
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SEO friendly plugin.
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New mouse hover event, So you can set from admin that you want to load social widgets/button on mouse click or on mouse hover.
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<h4>Included Files</h4>
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wp-ajax-social.php
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timthumb.php
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inc Folder (contains files for admin and front end)
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images folder
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js folder
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css folder
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WordPress Ajax Social

Wordpress Social plugin to load facebook,Twitter and Google plus like/share via Asynchronously Like Mashable.com to reduce site load time.

SocialMyBlog vs WordPress Ajax Social