1. Spam Karma 2.2 Plugin (http://unknowngenius.com/blog/wordpress/spam-karma/) will allow you to have users comment on your blog posts without registering, making it as easy as possible for browsers to be interactive at your site.  However, it will reduce the amount of spam comments that need to be manually deleted so that you have a clean site.  You can prevent spam while letting users easily post and comment on your site.
2. Author Bio Plugin (http://guff.szub.net/2005/01/31/get-author-profile/) allows you to have a mini bio for the author of a post after every post that is made.  This is ideal for blogs that have multiple writers or interactive blogging authors who regularly post.  The Author Highlight Plugin (http://wordpress.org/extend/plugins/highlight-author-comments/) is an associated plugin that highlights comments made by the author after the initial post, differentiating them from other users’ comments.  These plugins allow you to give credit to the author of the post and show when they have responded to comments or added additional information.
3. WP-Cache (http://codex.wordpress.org/Function_Reference/WP_Cache) and WP-Super Cache (http://wordpress.org/extend/plugins/wp-super-cache/) Plugins are a great way to help optimize your site when you have a high traffic blog.  Heavy traffic WordPress blogs may run slower unless they are properly optimized and these plugins will help with this.  The plugins automatically generat4e static HTML pages as opposed to the dynamic PHP pages that take more processing power.
4. MoFuse (http://www.mofusepremium.com/) will turn your WordPress blog into an easily accessible mobile blog.  With so many people using their cell phones as web browsers when on the go it is important to make your site accessible to mobile devices.  Users can easily browse to your site using their browser enabled cell phone.
5. WP-PageNavi (http://wordpress.org/extend/plugins/wp-pagenavi/) is a way to enhance the pagination of WordPress blog pages so you have additional options aside from the standard “previous” and “next” options.  This will allow you to be more easily navigable and it can help enhance your search engine optimization.
6. HotLink Protection Plugin (http://www.bahn-spass.de/2007/05/05/hotlink-protection/) is a great way to ensure that others do not steal bandwidth or use your images on their own site without prior permission.  If this is attempted a default image is instead substituted.
7. AdSense Deluxe Plugin (http://www.acmetech.com/blog/adsense-deluxe/) is perfect for any blogger using Google’s AdSense program to generate additional income.  It allows you to easily insert Google ads into your WordPress blog posts to enhance the amount of potential clicks and subsequent ad generated revenue.
8. Permalinks Migration Plugin (http://wordpress.org/extend/plugins/advanced-permalinks/) will allow you to change the way your link is shown without adversely affecting search engine indexing or bookmarked links.  If you have a site that previously used links that were not optimized for maximum SEO, you can change it to have the blog post title in the URL.  However, with the plug in, previously saved or indexed links will simply redirect to the new ones.
9. The Google Sitemap Plugin (http://www.arnebrachhold.de/projects/wordpress-plugins/google-xml-sitemaps-generator/) will automatically generate a sitemap that can be used for Google as well as other search engines.  It is fully compliant with sitemap standards.
10. Related Posts Plugin (http://www.blogtrafficexchange.com/related-posts/) allows you to predetermine a number of related post links that will be shown on new posts.  It uses keywords to determine posts that may be of interest to existing readers.

WordPress is easy to use but more importantly it is easy to modify using many different open source and free plugins.  You can customize your site for your specific uses and needs.  With the top ten plugins, you can make your site more interesting and user friendly.

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2. 5 WordPress Plugins to Add Ratings and Polls to Your Blog
3. Use Twitter to Promote your WordPress Blog: The Top Six Plugins

The default setting for pagination is “previous” and “next”.  When you are at one post you can click either “previous” or “next” to move to older or newer blog post entries.  However, many people do not find this option appealing and want something more attractive and easier to use.  If you use a different format, you can make the site easier to navigate.  Users can choose particular pages, see what page they are on, move to the first page or last of a section and navigate how they deem fit.  This makes the site more user friendly and navigable.  In addition, this also helps bots when searching through your site which allows them to index your site easier, potentially optimizing your search engine results.

One of the best ways to modify your pagination in WordPress is to use a plugin called WP-PageNavi (http://wordpress.org/extend/plugins/wp-pagenavi/).  Simply download and install it then you can use it.  The bottom of the page will have additional options.  There is a page X of XX which shows you what page you are on and how many exist.   You can navigate to the first page, last page, previous page and next page.  You can also move from a single page to another page by simply clicking on the numbers that are available corresponding to the number of pages.  Using this plugin will help your site look better, will allow users to more easily navigate through the site and will assist with search engine optimization (SEO).

Related posts:

1. Top Ten Navigation Improvements in WordPress
2. Top Ten Recommendations for Enhancing SEO in WordPress
3. How to Change Links without Losing Traffic in WordPress

1. Subscribe to Comments by Mark Jaquith: This plugin allow your visitors subcribe to individual posts of you blog, allowing them to receive notification via email whenever someone leaves a new comment on the post.
2. ShareThis by Alex King: ShareThis allows visitors to share content through email and popular social bookmarking services such as Technorati, del.icio.us, and Digg. It is a plugin that combines an “email this” plugin and social bookmarking service.
3. All in One SEO Pack by uberdose: All in One SEO Pack helps you finne-tune your blog by creating optimized titles and keywords for your individual posts automatically.
4. WP-DB-Backup: This is a plugin that provides easy method of creating a backup of your wordpress database. It allows you to schedule regular hourly, daily, or weekly backups and have those backup files emailed to you.
5. Google XML Sitemaps by Arne Brachhold: This plugin allows you to create Google-compliant site map of your blog. Whenever a new post or page created, the sitmap is updated and submitted to major search engines.

WordPress Gallery Plugins:

1. NextGen Gallery by Alex Rabe
2. Organizer by Imthiaz
3. Random Image Widget by Marcel Proulx
4. Mini-slides by Roland Rust

Related posts:

1. Using WordPress with Facebook: The Top Ten Plugins to Make it Easier
2. Use Twitter to Promote your WordPress Blog: The Top Six Plugins
3. 5 WordPress Plugins to add Professionalism to your Blog