WordPress is the software I run this, and several other websites on. One reason I like WordPress is it’s plugin structure. Plugins add features and functions to your website. Here are my favorites:
All In One SEO Pack is a complete search engine optimizer. It combines the best practices in search engine optimization, in one simple to use package, including keywords, page descriptions, title updates and many other features.
Ultimate Google Analytics inserts Google Analytics code into your website, without having to modify your WordPress templates. Google Analytics is a website statistics package that tracks traffic sources, web hits and a wealth of information about the people are on your website. I prefer it to WordPress Stats.
FeedBurner FeedSmith redirects all RSS readers to FeedBurner.com. FeedBurner is a great way to track and manage your RSS subscribers. Since FeedBurner is serving up your RSS feeds (instead of your web host), it lightens the load on your website.
Sociable automatically adds links on your posts and pages to popular social bookmarking sites (Digg, Del.icio.us, StumbleUpon, Technorati and many, many others). It’s another great way for readers to find you.
WordPress Database Backup is On-demand backup of your WordPress database. You should backup your database on a regular basis and before major upgrades and this plugin makes it a snap.
There are plenty of other fine WordPress Plugins, these are the few that I almost always install