Wordpress rocks. In extendability (widgets, plugins, that too all free and open source); in design (beautiful free themes, wonderful CMS capabilities, magazine styles, et al); and in ease of use. Just for starters, the plugins I use on my website (which are listed by using another plugin!):

There are 60 plugins used: 35 active plugins and 25 inactive plugins.

Active Plugins

  Akismet 2.0.2
» Matt Mullenweg (url)
Akismet checks your comments against the Akismet web service to see if they look like spam or not. You need a WordPress.com API key to use it. You can review the spam it catches under “Comments.” To show off your Akismet stats just put <?php akismet_counter(); ?> in your template.

  All in One SEO Pack 1.4.6.13
» Michael Torbert (url)
Out-of-the-box SEO for your Wordpress blog.

  Asides widget 1.0
» James Carppe (url)
A widget to display the content of the n most recent posts from the specified category - designed for aside usage.

  Audio player 1.2.3
» Martin Laine (url)
Highly configurable single track mp3 player.

  Category Cloud Widget 1.3
» Lee Kelleher (url)
Adds a sidebar widget to display the categories as a tag cloud.

  del.icio.us widget 1.0
» Automattic, Inc. (url)
Adds a sidebar widget to display del.icio.us links

  Feed Statistics 1.3.1
» Christopher Finke (url)
Compiles statistics about who is reading your blog via an RSS feed and what they’re reading.

  FireStats 1.3.6-stable
» Omry Yadan (url)
Statistics plugin for WordPress.

  flickrRSS 4.0
» Dave Kellam (url)
Allows you to integrate the photos from a flickr rss feed into your site.

  Flickr Thumbnails Widget 1.2
» James Carppe (url)
Displays thumbnails from Flickr based on the user/group/tag you provide.

  Google Reader widget 1.8
» James Wilson (url)
Adds a sidebar widget to show your latest shared stories.

  Google Reader widget 0.1
» Miguel Ibero (url)
Adds a widget with the links to the stories shared or starred or of a certain tag of a google reader

  Gregarious Reaching 2.0
» Ankur Kothari (url)
The ultimate social bookmarking plugin. Need I say more?

  Lightbox JS v2.03.3 Plugin 1.7
» Peppe Argento (url)
Used to overlay images on the current page. Lightbox JS v2.03.2 by Lokesh Dhakar.

  Random Redirect 1.1
» Matt Mullenweg (url)
Allows you to create a link to yourblog.example.com/?random which will redirect someone to a random post on your blog, in a StumbleUpon-like fashion. You can also specific in the URL `random_post_type` or `random_cat_id`.

  Snap Shots™ Plugin 1.3
» Ajay D’Souza (url)
Add Snap Shots to your blog. Go to Options >> Snap Shots to configure.

  Sociable 2.0
» Peter Harkins (url)
Automatically add links on your posts to popular social bookmarking sites. Go to Options -> Sociable for setup.

  Twitter widget 1.5
» Sarah Isaacson (url)
Sidebar widget to display your Twitter timeline. The widget allows you to choose to display your twitter username in front of your updates. You can also choose whether to display the time before or after the twitter post.

  Wordpress Automatic Upgrade 1.2.2
» Keith Dsouza (url)
Wordpress Automatic Upgrade allows a user to automatically upgrade the wordpress installation to the latest one provided by wordpress.org using the 5 steps provided in the wordpress upgrade instructions. Go to Wordpress Automatic Upgrade to upgrade your installation Thanks to Ronald Huereca for making the plugin run in automatic mode.

  WordPress Database Backup 2.2
» Austin Matzko (url)
On-demand backup of your WordPress database. Navigate to Manage → Backup to get started.

  WordPress Related Posts 0.9
» Denis (url)
Generate a related posts list via tags of WordPress

  WordPress XML Export 2.0
» Aaron Brazell (url)
This will generate a WordPress XML export for import into other WordPress blogs. Based on code provided in 2.1+ versions of WordPress and originally written by Matt Mullenweg.

  wp-cache 2.1.1
» Ricardo Galli Granada (url)
Very fast cache module. It’s composed of several modules, this plugin can configure and manage the whole system. Once enabled, go to “Options” and select “WP-Cache”.

  WP-EMail 2.20
» Lester ‘GaMerZ’ Chan (url)
Allows people to recommand/send your WordPress blog’s post/page to a friend.

  WP-EMail Widget 2.20
» Lester ‘GaMerZ’ Chan (url)
Adds a EMail Widget to display most emailed posts and/or pages on your sidebar. You will need to activate WP-EMail first.

  WP-PageNavi 2.11
» Lester ‘GaMerZ’ Chan (url)
Adds a more advanced paging navigation to your WordPress blog.

  WP-PluginsUsed 1.00
» Lester ‘GaMerZ’ Chan (url)
Display WordPress plugins that you currently have (both active and inactive) onto a post/page.

  WP-PostRatings 1.11
» Lester ‘GaMerZ’ Chan (url)
Adds an AJAX rating system for your WordPress blog’s post/page.

  WP-Print 2.11
» Lester ‘GaMerZ’ Chan (url)
Displays a printable version of your WordPress blog’s post/page.

  WP-Stats 2.11
» Lester ‘GaMerZ’ Chan (url)
Display your WordPress blog statistics. Ranging from general total statistics, some of my plugins statistics and top 10 statistics.

  WP-Stats Widget 2.11
» Lester ‘GaMerZ’ Chan (url)
Adds a Stats Widget to display stats from WP-Stats Plugin. You will need to activate WP-Stats first.

  WP-Sticky 1.00
» Lester ‘GaMerZ’ Chan (url)
Adds a sticky post feature to your WordPress’s blog. Modified from Adhesive by Owen Winkler.

  Yet Another Related Posts Plugin 2.0.4
» mitcho (Michael Yoshitaka Erlewine) (url)
Returns a list of the related entries based on keyword matches, limited by a certain relatedness threshold. New and improved, version 2.0!

  Youtube Favorites Plugin/Widget 1.0
» Ozh (url)
Customizable display of your latest Youtube favorite videos. (quick readme & manual)

  YouTube widget 1.1
» James Wilson (url)
Adds a sidebar widget to show a YouTube video.

Most of these are wonderful in functionality and are easily customisable. Do check them out for using in your website. And if you are using anything other than Wordpress to run your blog, it’s time to change, I say. Download the Wordpress engine and host your own; or get a free blog at Wordpress.com.