Josh Davenport

WordPress plugin that can reactivate the current theme.
Useful primarily for helping with development, the plugin will allow you to swiftly trigger code that is hooked into the ‘after_switch_theme’ and ‘switch_theme’ actions. Before, you had to switch to an alternative theme and back to the original, now you only need to find Tools > Reactivate Theme.

Reactivate Theme

This plugin provides a utility to reactivate the currently active WordPress theme for development purposes.

Paul Bearne

This is a simple tool that helps you provide the site verification code and file generator for any service that needs to verify the site 
via a comment / meta in the head section or via a file URL.
This is a generic site certification tool. 
To use it, just add the plug-in and turn it on as needed. 
You will no longer need to FTP a file to the site root or add extra tags to the header.php in the template to enable your site to be verified by third-party services.
Some examples: 
Google webmaster tool needs a file called googleXXXXXXXXXXXXX.html with no contents. 
OR 
<meta name=”google-site-verification” content=”XXXXXXXXXXXXXXXXXXXXXXXXXXXXX” /> in the HTML head, 
Without this plugin, you would have to create a file and FTP it to your server or edit your template. With the plugin, you can generate the verification method needed automatically via the control panel.
Similarly, Trustwave SSL wants a file called cert.html with the contents of 
“Trustwave SSL Validation Page”

WP Site Verification tool

A tool to enable verification of site ownership via file or meta tag.

Reactivate Theme vs WP Site Verification tool