Add a delay before published posts show up in the RSS feeds.
Set a max width for the embeds using oEmbed in the content.
Remove the Website URL field from the Comments form.
Disable Emoji's in WordPress to improve your site's performance
Prevent the Login box from shaking when entering the wrong password or username.
Remove an extra request and prevent others from adding embeds in your site.
Add the user's name as a default alt tag to the Gravatar images loaded on...
Change WooCommerce Archive products number per page code snippet.
Use this snippet to remove query string from CSS & JS files and improve performance...
All the Goodies
Prevent WordPress from adding the Windows Live Writer manifest link to your pages.
Prevent WordPress from automatically creating pingbacks from your own site.