Bhagirath Dhanani

Floating Social Buttons Provide an easy way to add floating social sharing button.
Floating Social Buttons plugin allow to select following button.
1. Facebook Like.
2. Facebook Share.
3. Tweet.
4. Google Plus.
5. Linkedin.
6. Digg.
7. StumbleUpon.
8. Pinterest.
Floating Social Buttons having following Setting options
<ol>
<li>You can choose which button to display.</li>
<li>You can select position of button.</li>
<li>You can hide this button on mobile device.</li>
</ol>
This is simple and perfect plugin.

Floating Social Buttons

Jaspreet Chahal

This plugin gives you control to initially hide part of your article from user. Content is displayed correctly once user Facebook Like or +1 your page
Usage: Warp your content in [ltu][/ltu] tag. You are able to use this tag once in your post. Make sure that plugin is active and enabled.
Make sure that you’ve created a Facebook App ID
To check out other plugins by me please visit http://jaspreetchahal.org
To Upgrade to PRO version 
visit http://jaspreetchahal.org/wordpress-like-to-unlock-content-plugin/

Like to Unlock lite

This plugin gives you control to initially hide part of your article from user. Content is displayed correctly once user Facebook Like or +1 your page

Floating Social Buttons vs Like to Unlock lite