WordPress plugins are an ever changing thing. Someone comes out with a better plugin to do the same task as another plugin all the time, and so it always interests me to see who is using what to run their sites.
John Chow recently put up his top ten list, and there were some on there that seemed pretty interesting to me like Optimal Title and Digg This.
Others, were what you’d expect, like Akismet, Google Sitemap Generator, and the WordPress Database Backup.
Check out his full list and don’t forget to mention if you know a better plugin to replace the ones he is already using.