In fact more than 16% of all websites are running on WordPress in 2012. WordPress holds 53.8% of the market share for Content Management Systems (CMS). (source: http://wpmu.org/amazing-wordpress-statistics/)
WordPress was first released in May 2003. As of July 10, 2012 there were 20,264 plugins available in the WordPress Plugin Directory. Plugins can extend WordPress to do almost anything you can imagine.
Here is my own list of WordPress Plugins I like to use:
Protects your blog from comment and trackback spam. Akismet checks your comments against the Akismet web service to see if they look like spam or not and lets you review the spam it catches under your blog’s “Comments” admin screen.
Out-of-the-box SEO for your WordPress blog. Optimizes your WordPress blog for Search Engines.
Simple automated backups of your WordPress powered website.
4. Contact Form 7:
Can manage multiple contact forms, plus you can customize the form and the mail contents flexibly with simple markup.
Reward your readers by automatically placing a link to their last blog post at the end of their comment. Encourage a community and discover new posts.
Add a floating bar with share buttons to your blog. Your all in one share buttons plugin.
7. Grid Archives:
Grid Archives offers a grid style archives page for WordPress posts.
Simply hide widgets on specified pages. Adds checkboxes to each widget to either show or hide it on every site page. Change your sidebar content with different pages.
Allows finer control over the Post Revision system included with WordPress.
Easily display related content on your website Thumbnails or Text, on all your pages.
Create a list of URLs that you would like to 301 redirect to another page or site. It’s especially handy when you migrate a site to WordPress and can’t preserve your URL structure. By setting up 301 redirects from your old pages to your new pages, any incoming links will be seamlessly passed along, and their PageRank (or what-have-you) will be passed along with them.
Generates a valid Google XML sitemap with a very simple admin interface which can then be used with Google’s Webmaster Tools.
13. Thank Me Later:
Automatically send a ‘thank you’ e-mail to those who comment on your blog. This plugin engages the visitor by reminding them to check back for responses or new blog posts.
The Slide (currently in private beta) recommends related posts from within your site on a widget that “slides” in at the bottom of the page.
15. WP Security Scan:
Checks your WordPress website/blog for security vulnerabilities and suggests corrective actions.
16. WP Smush.it:
Reduce image file sizes and improve performance using the Smush
A plugin which formats your site with a mobile theme for visitors on Apple iPhone / iPod touch, Google Android, Blackberry Storm and Torch, Palm Pre and other touch-based smartphones.
What WordPress Plugin do you like or recommend?