Download Monitor is a plugin for uploading and managing downloads, tracking download hits, and displaying links. The download link on this page, and even the downloads in the website footer, are all powered by it. The whole idea to this plugin is to keep your website downloads organised, and provide means to monitor the amount of downloads a file has, along with an easy method of linking to those files using its own tags.

Pricing: Free
Requirements: -
Source: http://blue-anvil.com/archives/wordpress-download-monitor-plugin-v15

WordPress Live Search Plugin enables users perform searches on your blog without refreshing the page. By the use of Ajax, users can save a lot of time when they are performing searches on your blog. It can also increase the interactivity between the users and the blog, because the responses from the searching is instant. This plugin can  only displays 10 results from the searching. You need to refine the search terms if you cannot find what you are looking for.

However, this plugin is configured for use with the default wordpress search form. If you have changed the id attribute of the search form (searchform) or the search input box(s), this plugin will not work.

Pricing: Free
Requirements: -
Source: http://addictedtonew.com/archives/145/wordpress-live-search-plugin/

Code Markup is a WordPress plugin that makes it easy to include program code samples in your posts. You can even include HTML markup in the code sample; Code Markup magically knows which characters should be displayed as code and which should be rendered as HTML.

The <span> tag is rendered as normal HTML. This is very useful for times when you want to highlight a particular piece of code in your listing. Code Markup also prevents WordPress from removing backslashes, turning your quotes into curly quotes, rendering decrements (--) into dashes (–), and so on.

Pricing: Free
Requirements: WordPress 1.5+
Source: http://www.thunderguy.com/semicolon/wordpress/code-markup…

Spam Karma 2 (SK2) is an anti-spam plugin for the WordPress blogging platform. It is meant to stop all forms of automated Blog spam effortlessly, while remaining as unobtrusive as possible to regular commenters. Spam Karma 2 is the proud successor to Spam Karma, with whom it shares most of the development ideas, but absolutely none of the code. You can imagine the popularity of this plugin by looking at over 1900 comments under the post.

Pricing: Free
Requirements: WordPress 1.5.1+
Source: http://unknowngenius.com/blog/wordpress/spam-karma/

Get Recent Comments displays excerpts of the most recent comments and trackbacks that have been posted to the articles in your blog. It can handle trackbacks and comments in separate lists which I found really useful. It has Widget support. It has an option to exclude comments to posts in certain categories as well.

Pricing: Free
Requirements: -
Source: http://blog.jodies.de/archiv/2004/11/13/recent-comments/

Theme Test Drive Wordpress plugin allows you to safely test drive any theme on your blog as administrator, while visitors still use the default one. It happens completely transparently and they will not even notice you run a different theme for yourself. Best part is you can even set the testing theme options in the Admin panel while you are testing the theme.

It turns out to be really useful for bloggers when we are changing the theme slightly or creating a completely new theme for our blogs. We do not have to create another temporary wordpress blog in order to test the new theme. I totally recommend this plugin to every blogger.

Pricing: Free
Requirements: -
Source: http://www.prelovac.com/vladimir/wordpress-plugins/theme-test-drive

Social bookmarking allows users to submit, comment on, and “promote” websites. The Gregarious plugin supersedes the Digg This Reloaded Plugin and allows for seamless integration between your Wordpress Blog and social bookmarking sites such as Digg.com, Del.icio.us, Reddit and more. Requiring no editing of templates, and a simple point and click interface, Gregarious is the ultimate social bookmarking plugin for Wordpress. There is one downside of this plugin only, due to time constraints, the author is no longer guarantee support for this plugin.

Pricing: Free
Requirements: -
Source: http://lipidity.com/web/wordpress/wp-plugin-gregarious/

Title tags are arguably the most important of the on-page factors for search engine optimization (”SEO”). Post titles are also used as title tags by WordPress, considering that post titles should be catchy, pithy, and short-and-sweet; whereas title tags should incorporate synonyms and alternate phrases to capture additional search visibility.

SEO Title Tag makes is dead-easy to optimize the title tags across your WordPress-powered blog or website. Not just your posts, not just your home page, but any and every title tag on your site! If this plugin, along with a few hours of keyword research and copywriting of optimized titles, doesn’t make a significant impact on your search traffic, you’re doing something wrong.

Pricing: Free
Requirements: -
Source: http://www.netconcepts.com/seo-title-tag-plugin/

Global Translator is a free and open source Wordpress Plugin which is able to dynamically translate your blog in the following thirteen different languages: English, French, Italian, German, Portuguese, Spanish, Japanese, Korean, Chinese, Arabic, Russian, Greek, Dutch.
The number of available translations will depend on your blog language and the translation engine you will chose to use. The most powerful features which Global Translator provides are:

Double Translation Engine System

it has the ability to provide the translations by using both Google Translation Engine and Babel Fish

Search Engine Optimized

it uses the permalinks by adding the language code at the beginning of all your URI. For example the english version on www.domain.com/mycategory/mypost will be automatically transformed in www.domain.com/en/mycategory/mypost

Fast Caching System

a built-in cache is provided in order to reduce the online connections to the translation engines

Fully configurable layout

you can easily customize the appearance of the translation bar by choosing between a TABLE or DIV layout for the flags bar and by selecting the number of translations to make available to your visitors

Pricing: Free
Requirements: WordPress 2.0+
Source: http://www.nothing2hide.net/blog/wp-plugins/wordpress-global-translator…

The current default WordPress administration area is functional, but OrderList felt it could be improved. Would you like to have a new look for your WordPress adminstration area? WordPress Tiger Adminstration looks really nice and improved the usability. The author didn’t want to touch the XHTML framework of the admin, but instead relied on the power of CSS2 to manipulate the presentation. The whole package has been wrapped up into a single plugin. Just install and activate. The new design will be immediately visible. Take a look at the following screenshots, you would like to install this plugin immediately.

Pricing: Free
Requirements: -
Source: http://orderedlist.com/wordpress-plugins/wp-tiger-administration/