I’ve been a WordPress developer for 10 years, and have worked on hundreds of different websites. Here I’ll stay tips, themes, and plugins that I find make running a WordPress site easier and more fun.
Broken Link Checker – Periodically scans your site and tells you where the broken links. The admin UI makes it super easy to update the links, without having to edit the post/page. Can be used to really easily audit comments, and remove the URLs if necessary.
Heroic Favicon Generator – Allows you to upload a single image and then it generates all of the various favicon formats.
mailtrap.io – Intercepts all outgoing emails sent from WordPress (or MAMP, or whatever you like), so that you can easily check emails. Especially useful for membership sites to prevent emailing members accidentally.