Sutherland Boswell

Import your latest Google+ activity into your site as posts. Currently supports most types of activity on Google+ with more options coming soon.
This is an early version so use wisely. Please let me know about any bugs or requests.
<h3>Roadmap</h3>
This plugin is currently in its early stages, so send your feedback or ideas to sutherland.boswell@gmail.com and I’ll keep them in mind as development continues. Look for frequent updates, new features, and bugfixes.

Google+ Importer

Automatically create new WordPress posts from your activity on Google+ using Google+ Importer

mlazarov

Google Plus Profile Picture appear in Google Search. Integrate Google Plus Profile with WordPress. Make your website come up in Google.
Including Google authorship for multiple authors and for wordpress multisite
Just 3 easy steps to process: 
1. Plugin Installation 
2. Enter Google Profile URL in Profile Page 
3. Post a link back from Google Plus Profile to Your Current Website

Google Plus Authorship

Add Google Plus Profile Picture to Google Search Results. Very Easy to implement! Google authorship for multiple authors

Google+ Importer vs Google Plus Authorship