21. Easy Gravatars
Gravatars are, as you might know synonymous for Global Avatars. With Easy Gravatars plugin you can enable gravatars for comments so that people commenting can display their Gravatar-image. Go to Gravatars.com to create your own global avatar. Then, everytime you comment, and add the same email address that you registered at Gravatars.com, your own gravatar will show up next to your comments.
20. Sociable
Developed by the plugin guru Joost de Valk, Sociable automatically adds links to all your favorite social bookmarking sites to your posts.
19. YARPP
Yet Another Related Posts Plugin, YARPP allows you to match and display relevant and relating content below posts or in the sidebar. This plugin is great to increase your site's navigation paths and decrease bounce rate.
18. Adsense Manager
Rather than heading over to your Google account every time you want to manage your Adsense ads, with this plugin you can implement them into your Wordpress admin. Developers have also included a donating option, which is set to a three percent default of your adsense earnings.
17. Google Analyticator
Google Analyticator is a great plugin for anyone who wants to keept track of website statistics using Google Analytics with Wordpress. Automatically adding script code needed, this plugin also comes with a widget to view stats directly in the admin. It also support hiding of admin visits without affecting the stats.
16. SidePosts Widget
Display featured posts in the sidebar with SidePosts Widget. This allows you to show more content to your visitors, and in doing so improving page navigation.
15. FlickrRSS
FlickrRSS is the plugin that connects your Flickr account with your website, offering a variation of ways to display your Flickr photos on your site.
14. Add to Any: Share/Bookmark/Email Button
Much like Sociable, Add to Any adds links popular social bookmarking sites, but in addition this plugin comes with a dynamic widget as the screenshot shows above. Plus it changes language based on the visitor's IP.
13. WPtouch iPhone Theme
This goofy plugin changes your site design to the iPhone look.
12. Twitter Tools
By none other than wp veteran Alex King, this plugin intergrates your Twitter account with your Wordpress site.
11. Wp-PageNavi
Forget about "Older posts", PageNavi adds a more advanced page navigation below the loop.
10. Wordpress Popular Posts
Listing the most populat posts, this plugin gives the visitor additional options for continuous navigation through the sites content.
9. Wp-Polls
With Wp-Poll you can create any number of different polls, manage and design them, and to finally be displayed through a sidebar widget or directly in a posts.
8. Wp-PostRatings
Allows your visitors to rate posts. Several different icons are included and the results can be display as highest rated through a sidebar widget.
7. Cforms II
Cforms is currently the dominating plugin when it comes to contacts forms on Wordpress sites. You have significant freedom regarding the cform design and can add it to a post, page or the sidebar.
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6. Wp Digg This
Unlike other digg-plugins, Wp Digg This allows you to show the digg button selectively, and not in all posts.
5. Wp-Super Cache
By generating HTML files, Wp-Super Cache takes substantial load off the web server, caused by heavy PHP scripts in the Wordpress CMS. This plugin is great in case of any unexpected spikes in traffic, as it lowers the risk of your website crashing due to CPU overload.
4. Simple Sitemap
This sitemap plugin is perhaps not the most aesthetically pleasing, but has a load of functionality to make up for it. A simple and easy way to generate an xml-sitemap for your site. Additionally, search engines are notified when you create your sitemap.
3. Wp-db-backup
Use this plugin to back up your Wordpress databases. You also have the option of scheduling frequent backups.
2. Akismet
The one and only spam-filter against spam and false trackbacks in comments. As soon as your site starts ranking in the search engines, spam is going to find its way to your posts. A must-have plugin to avoid wasting time and sanity on deleting spam.
1. IntenseDebate
IntenseDebate is an awesome plugin that add several advanced function to site commenting. Comments can be voted up or down, directly replied to and users IP addresses can be blocked. This plugin will spice up your comment section for sure.
Commented by: Amit Desai, 16 July, 2009
i have shared my experience on installing ID on wordpress 2.7.1 and have given solutions to all major issues faced during installation. you can read it here http://www.gigathoughts.com/technology/how-to-install-intensedebate-on-wordpress-271.html
Commented by: Abdullah-al-amin, 26 June, 2011
A VERY GREAT LIST! i really like it.
Commented by: Prashant, 11 March, 2012
all is useful plugins thanks for share ...:)