Must-have plugin for all my sites

I develop a lot of websites using WordPress, and this plugin is always on my list of “must install” plugins. It does a great job of generating (and keeping current) XML sitemaps (required by Google Webmaster Tools, a valuable resource for any website owner, even if you’re not a developer).

I really like the numerous settings for tweaking the sitemap (the ability to include or exclude any content, prioritize content, and specify search engine crawl frequencies). This is a free plugin but it’s well worth donating to the developer.