This post has a list of some of the best WordPress Plugins out there. I have been using each of these plugins on this blog for over 2 years, please feel free to share and add plugins I may have missed out using the comment section. Cheers !
- Akismet : Akismet checks your comments against the Akismet web service to see if they look like spam or not.
- WP-Markdown : Allows Markdown to be enabled in posts, comments and bbPress forums.
- Disqus Comment System : The Disqus comment system replaces your WordPress comment system with your comments hosted and powered by Disqus.
- W3 Total Cache : Easy Web Performance Optimization (WPO) using caching: browser, page, object, database, minify and content delivery network support.
- WordPress Backup to Dropbox : Keep your valuable WordPress website, its media and database backed up to Dropbox in minutes with this sleek, easy to use plugin.
- WordPress SEO by YOAST : Improve your WordPress SEO: Write better content and have a fully optimized WordPress site using the WordPress SEO plugin by Yoast.
- Contact Form 7 : Just another contact form plugin. Simple but flexible.
- Flare : Flare is a simple yet eye-catching social sharing bar that gets you followed and lets your content get shared via posts, pages, and media types..
Analytics and Adsense
- Google Analytics for WordPress : Track your WordPress site easily and with lots of metadata: views per author & category, automatic tracking of outbound clicks and pageviews.
- Woopra : This plugin adds Woopra’s real-time analytics to any WordPress installation.
- Feedjit Live Traffic Feed : Feedjit lets you see friends and visitors as they arrive on your blog or website. Know when your best friends read about your latest adventure. Be alerted when your most important clients view your latest product offering. Feedjit lets you know, right now, who is visiting your site. Simply add the Live Traffic Feed and instantly start seeing who is visiting your site as they arrive.
- Traffic Counter Widget : TCW lets your users know how much traffic you have on your blog. It counts pages visited, hits and unique IPs on your blog and shows it in a widget.
- Executable PHP widget : Like the Text widget, but also allows working PHP code to be inserted.
- WP Easy Uploader : Easily upload any type of content without the need for FTP. You can even upload plugin and theme archives, and the files will be extracted for you.
- WPtouch : WPtouch: A simple, powerful & elegant mobile theme for your website.
- Yet Another Related Posts Plugin : Display a list of related entries on your site and feeds based on a unique algorithm. Now with thumbnail support built-in!
- Broken Link Checker : This plugin will check your posts, comments and other content for broken links and missing images, and notify you if any are found.
- Bottom of Every Post : This plugin adds some content to the bottom of every post. That is all. No extra crap.
- Smart Archives Reloaded : Easily display posts grouped by year and month, in one or more elegant formats
Further Reading : Tips And Tricks HQ : List of the Best and Must Use WordPress Plugins