You can now use this plugin to increase your SEO! The GHTime service now provides a link back to your blog whenever a new code is created. Since all the GHTime codes are indexed with Google, this will provide crucial backlinks to your site which will increase your rankings on Google and other search engines. 
This plugin is essential for anyone wishing to protect their intellectual property. 
The Wp to GHTime plugin allows you to protect your intellectual property by using a <a href="http://www.ghti.me" rel="nofollow ugc">GHTime</a> Data Protector Code to timestamp each post for you. The GHTime code is displayed at the bottom of each post and can be verified by clicking on the code. 
Each code is unique and provides proof that the information contained in each of your blog posts belongs to you.

WP to GHTime

Increases your SEO and Google rankings by providing links back to your blog. Protects your intellectual property by using a GHTime Data Protector Code …

CongBom

Generate most common meta tags to your WordPress site.
Open Graph (og) tag via post content and featured image:
<pre><code><meta property="og:url" content="..." />
<meta property="og:type" content="..." />
<meta property="og:title"content="..." />
<meta property="og:description" content="..." />
<meta property="og:image" content="..." />
</code></pre>
Meta description tag via post content or excerpt:
<pre><code><meta name="description" content="..." />
</code></pre>

Meta Tags Generator

It assumes that the theme's screenshot is in .png format. For smaller file size reason, I prefer using .jpg images for my theme's screenshots.

To set the record straight, .png is the preferred format, although other image formats are allowed. This is a direct quote from the Codex pages:

"Note that optionally, .jpg, .jpeg, and .gif are also valid extensions and file formats for the screenshot (though not recommended)." 

Other than that, this plugin is refreshingly small in size, and that's a good thing.

Almost there!

Automatic generate meta tags. Let your WordPress site optimize with Search engine & Social sharing.

WP to GHTime vs Meta Tags Generator