NOTE: If you'd prefer to view this information as a blog post, check out this entry in our Five Apps blog.
WordPress is the most popular blogging tool available. And blogging isn't just for personal use now. It has turned into a great marketing tool that can help spread the word about your product or service. Naturally, if you decide to take on a blog for your company, you'll want to make sure it has as much in the way of features and flexibility as you can get. WordPress offers just that in the way of plugins.
Thousands of plugins are available, and "essential" is in the eye of the blogger. But I've rounded up five that I think are highly useful no matter what kind of blog you maintain.