I have the following plugins - my nifty social media plugin is a paid for one because I wanted something very specific and for Jon to stop complaining about the floating buttons I used to have. The one I recommend besides the Google ones, Yoast and Jetpack is Eggplant as it's great when you come to do deadlink maintenance on your blog (do it monthly to avoid a large build up). Obviously depending what you want to do and how you want it to look/function will decide what you install. If you want to know more about any of mine just ask
Add Categories to Pages - Easily add Categories and Tags to Pages. Simply Activate and visit the Page Edit Screen.
Age Verify - A simple way to ask visitors for their age before viewing your site.
Akismet - Used by millions, Akismet is quite possibly the best way in the world to protect your blog from spam. It keeps your site protected even while you sleep.
Archived Post Status - Allows posts and pages to be archived so you can unpublish content without having to trash it.
Cookie Law Info - A simple way of 'implied consent' to show your website complies with the EU Cookie Law, which came into force on 26 May 2012.
Custom Sidebars - Allows you to create widgetized areas and custom sidebars. Replace whole sidebars or single widgets for specific posts and pages.
Eggplant 301 Redirects - Create your own 301 redirects using this powerful plugin.
Google AdSense - Use Google AdSense and other Google tools with your WordPress site.
Google Analytics - Enables Google Analytics on all pages.
Jetpack by WordPress.com - Bring the power of the WordPress.com cloud to your self-hosted WordPress. Jetpack enables you to connect your blog to a WordPress.com account to use the powerful features normally only available to WordPress.com users.
List category posts - List Category Posts allows you to list posts by category in a post/page using the [catlist] shortcode. This shortcode accepts a category name or id, the order in which you want the posts to display, the number of posts to display and many more parameters.
Pinterest Verify Meta Tag - Add Pinterest meta tag verification code to the HEAD section of your site.
Shareaholic | share buttons, analytics, related content - The world's leading all-in-one Content Amplification Platform that helps grow your website traffic, engagement, conversions & monetization. See configuration panel for more settings.
Skimlinks - Skimlinks helps you easily monetize content by converting product links in your post into their equivalent affiliate links on-the-fly. Install the plugin and add a new revenue stream to your blog, including monetising the links in your RSS feed, without affecting your users' experience.
Social Network Tabs - Add feeds & profiles from your favorite social networks in slick slide out or static tabs - facebook like box, facebook recommendations, twitter, google +1, rss, digg, linkedin, delicious, flickr, youtube, last.fm, pinterest, stumbleupon, dribbble, vimeo, deviantart, instagram & tumblr.
This one is a paid-for plugin.
Title and Nofollow For Links - The plugin adds a title and a rel="nofollow" checkbox to the insert link popup box.
Webfluential - Makes managing your Webfluential profile.
WordPress Importer - Import posts, pages, comments, custom fields, categories, tags and more from a WordPress export file.
Yoast SEO - The first true all-in-one SEO solution for WordPress, including on-page content analysis, XML sitemaps and much more.