Your blog is not supported by WordPress? Doesn’t matter. This article can still be very helpful for improving usability of your company’s blog.

Most of the pluggins mentioned above have their equivalent codes available on the authors’ pages.

• Broken Link Checker

There is nothing worse for your visitor than broken link taking him to beloved 404 page.. To avoid this mistake, download Broken Link Checker plugin, which lists you all the pages/sub-pages with broken links.

• Google XML Sitemaps

This plugin generates special .xml sitemap which help search engines like Google, Bing, Yahoo etc. to better index your website. It’s also a MUST.

• NextGEN Gallery: Portfolio gallery

What would be your graphic design blog without showing your artwork to the potential customers?

NextGEN gallery plugin is one of the best pluggins is:

• All in One SEO Pack

I hope you read about importance of SEO for your blog.
All in One SEO pack plugin automatically optimises your WordPress design blog for Search Engines (Search Engine Optimization).

• Google Analytics for WordPress

Why? The Google Analytics for WordPress plugin automatically tracks and segments links from within posts, comment author links, links within comments, blogroll links and downloads. In a simple words: you can see how visitors suft within your page, how much time to they spend and from which page they leave your website.

Another good choice is to register your website in Alexa.com – you can see which rank position your website is. It’s free and allows you to see clickstream, demographics, keywords and much more. See the example of darcva.com

• WordPress Database Backup

It’s a MUST. This plugin backups your wordpress database automatically everyday.

• Contact Form

This plugin allows you to create contact forms. (Mind that your host provider has to have enabled one e-mail sender or SMTP Server)

• WP Follow Me on Twitter

This plugin allows you creating Follow Me badge with colour and location customization.

• GD Star Rating

This plugin is another must-have if you want fully interactive blog, where your visitors can rate your posts accordingly. This plugin also setting up advanced rating and review system for posts, pages and comments in your blog using single, multi and thumbs ratings.

• TweetMeme Retweet Button

Constantly growing popularity of Twitter makes this plugin another MUST-have. This plugin simply adds a button which easily lets your visitors retweet your blog posts on their Twitter accounts.

• WP-Polls

Adds an AJAX poll system to your WordPress blog.

• WP to Twitter

Tired of updating your Twitter account about your recent posts on the blog? It’s high time to install this plugin. It will do it for you automatically.

• Yet Another Related Posts Plugin

This useful plugin list related entries based on a unique algorithm for display on your design blog and RSS feeds.
and last but not least…

• WPtouch iPhone Theme

A plugin which formats your site with a mobile theme for the Apple iPhone / iPod touch, Google Android and other touch-based smartphones. Very VERY useful. Try.

Good luck!

Do you recommend any other pluggins? Why do you use them if you blog?