Disable plugins or switch themes for just you or the whole site for debugging, troubleshooting or accessing and restoring a broken website.
WP Mail Debugger captures and displays all emails sent through wp_mail() for debugging and troubleshooting.
Adds a "Flush Rewrite Rules" button to WP-Admin > Settings > Permalinks.
Prints out your webservers php settings as well as other information about your WordPress installation.
A WordPress plugin that lets you easily spot issues with your WordPress environment and server settings.