Plugins are like machines, devices, and computers that you should equip for your company to make it work properly. With WordPress plugins, you can extend functionalities of your site to what you want. For example, collecting stats of visitors, arranging ads, re-designing layouts and so on. Here is a list of WordPress plugins that I found useful (note that they are listed in random order):
1. WordPress.com Stats
It helps you to collect stats of visitors. It is similar to Google Analytics or StatCounter. However, the good thing is it is integrated to WordPress Dashboard.
2. WP Super Cache
It helps to make webpages of your site be loaded faster. Page loading speed is now an essential factor for Google’s ranking.
3. WPtouch iPhone Theme
It helps to view your site on mobile devices more friendly. Mobile users are growing and using this plugin can help to optimize delivering your site to them.
4. Google XML Sitemaps
It generates a sitemap that can help search engines such as Google make indexes for your site more efficiently. You can use the sitemap file in xml format to submit to Google WebMaster Tool to ask Google to index your site faster.
It better helps users to navigate and browse pages of your site.
6. All in One SEO Pack
This plugin automatically optimizes your WordPress blog for Search Engines (Search Engine Optimization).
7. AddToAny: Share/Bookmark/Email Button
This plugin helps visitors share, bookmark, and email your posts & pages using any service, such as Facebook, Twitter, Google Buzz, Digg and many more.
8. SI CAPTCHA Anti-Spam
It adds CAPTCHA anti-spam methods to WordPress on the comment form, registration form, login, or all. This is necessary to avoid spams, especially comment spams.
9. Yet Another Related Posts Plugin
It returns a list of related posts for the current post. Very useful for users when exploring and reading posts without taking time for searching.
10. TweetMeme Button
This plugin is very popular and used by biggest websites such as Techcrunch .com, CNET.com, Wired, Time Magazine and many more. It allows your blog post or page to be retweeted. It provides a live count of how many times your post/page has been retweeted throughout Twitter.
11. Easy AdSense
This plugin makes you deliver AdSense ads much easier. Many options are provided such as inserting ads into posts and sidebar, and adding a Google Search box. Easy and complete!
12. Google Analytics for WordPress
It generates tracking code for your Google Analytics account that allows you track and collect stats of your website easily.
13. All in One Webmaster
It makes the submission of your site’s sitemap to Google,Bing,Yahoo & Ask easier.
14. SEO Smart Links
This plugin provides automatic SEO benefits for your site in addition to custom keyword lists, nofollow and much more.
15. Advertising Manager
Easily place Google AdSense and other ads on your WordPress blog. Simple to use, with powerful management and optimisation features.
16. SEO Slugs
It removes common words like ‘a’, ‘the’, ‘in’ from post slugs to improve search engine optimization.