Ultimate Tweaker for WordPress

Ultimate Tweaker for WordPress
Add a custom 404 page
Customize pretty much every aspect of the WordPress admin (including for individual user roles)
Automatically rename media uploads
Minify theme code
Clean up code
Turn off site search (if you’re using an alternative search method like Google Search)
Exclude/include categories or tags
Automatically open external post links in a new window (saves lots of time compared to manually making all the links you add open in a new window!)
Disable right-click
Various security features
Remove “link” field from comments
Allow anonymous comments
Add login page logo and customize login page styling
Add Google Analytics tracking code
Turn off RSS feeds
Add featured images to RSS feeds
Add custom header or footer code
Enable admin keyboard shortcuts
Add maintenance mode and customize page