VoxHouseStudio

Makes use of Youtube API to show off the popularity stats of any YouTube channel including number of subscribers and total video view count of all videos on the channel, directly from your website!
Using widgets, you can position this in the sidebar, header, or anywhere else you think looks sexy. You can even include the widget multiple times with different account names to show stats for however many channels you own or want to track! Visit http://ryosa.com for examples.
Features & Uses in v1.0.0:
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Display your Youtube Channel statistics including Total Video Viewcount & Subscribers anywhere on your website
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Track statistics of any other YouTube channel
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Your choice of Compact or Full View (Full enables a header including the channel title)
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Channel Icon can be turned off and on
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Smart links directly to the channel
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</ul>
More configurability coming soon.

YES! YouTube Essential Statistics

A simple but robust Widgetized Heads up Display of any given YouTube Channel.

FanBridge

maguitai

pendexgabo

The FanBridge Toolbox plugin allows you to add an email signup form to your WordPress blog. The form automatically adds signups to your FanBridge account. Additionally you can add an events widget to show your upcoming events and a Fan Questions widget to allow your subscribers to ask you questions directly from within your WordPress.
Not using FanBridge? <a href="http://www.fanbridge.com/tour/?utm_source=wordpress&utm_medium=plugin_description&utm_campaign=plugin&ref=wordpress_plugin_description" rel="nofollow ugc">Learn more</a> about how FanBridge helps you grow, engage, and monetize your fan base.
After installing the FanBridge Toolbox plugin, you’ll be able to login to your FanBridge account. After logging in you will get the list of the widgets that you have created at FanBridge and choose which one you want to add to your blog. You will also be able to customize your signup form. 
Setup takes less than 5 minutes and doesn’t require any file editing. Download, customize, and get more fans!

FanBridge toolbox

The FanBridge Toolbox plugin allows you to add an email signup form, an events widget and a fan questions widget to your Wordpress blog

YES! YouTube Essential Statistics vs FanBridge toolbox