Here are 13 essential plugins that you should immediately install after finishing the WordPress installation. These are very useful and every blogger should have it. All these plugins collected and reviewed by Trevor Davis. Original post: nettuts.

Akismet

This one should be a no-brainer. Akismet uses their web service to check the comments on your blog to see if it looks like spam. The plugin is developed by the creators of WordPress, so it’s integrated nicely and is included in the WordPress install. All you need is a WordPress.com API key to get it up and running.

Download Akismet Plugin

Custom More Link

One thing that always bothered me about the the read more tag in WordPress is how when you click into the full article, it jumps down to where the more tag was inserted. This plugin allows you to get rid of that and completely customize the link.

Download Custom More Link Plugin

Different Posts Per Page

Let’s say that you want to display 3 posts on the homepage, 10 posts on the category pages, and 20 on the archives. If you want to avoid touching any of the template coding, you can just use this plugin to customize the number of posts that are displayed per page.

Download Different Posts Per Page Plugin

Google XML Sitemaps

While the plugin is called “Google” XML Sitemaps, the automatically generated sitemap is actually also supported by Ask, MSN, and Yahoo. It’s nice to be able to customize a few settings and then never having to think about your xml sitemap again.

Download Google XML Sitemaps Plugin

No Self Pings

Trackbacks are a great way to allow people to link to and discuss your blog articles, but this can also include your own site when you link to your own article. It would probably be better to use a related posts plugin for those, so this plugin is useful for filtering out your own trackbacks.

Download No Self Pings Plugin

Redirection

If you are moving from an existing website into WordPress, your URLs will probably be different. This plugin is useful for adding 301 redirects to make sure that users can end up in the right place. You can also keep track of 404 errors or create other redirects with full Regular Expression support.

Download Redirection Plugin

Search Unleashed

The regular WordPress search leaves a lot to be desired. This plugin fills that desire. You can perform full text searches on all posts, pages, comments, and other meta-data. The search index is automatically updated whenever you add or edit content, so you never have to worry about it being out of date.

Download Search Unleashed Plugin