Billy Wilcosky

Frontend Loader is a WordPress plugin designed to add a sleek, minimal loading spinner to your website, offering an enhanced user experience reminiscent of native applications. It intelligently detects ajax requests, link clicks, and page loads to activate, excluding WordPress heartbeat actions to avoid unnecessary activations. A settings page provides a way to tell the plugin to ignore certain types of clicks and/or ajax requests based on CSS selectors (Classes or IDs).
This plugin is brought to you by SkyWolf, Billy Wilcosky, and generous donators like you! If this plugin enhances your website, consider supporting development: https://www.buymeacoffee.com/billyw 
Suggested donation is $5.
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Frontend Loader aims to provide an app-like loading experience, enhancing your site’s feel and responsiveness. We appreciate your support and feedback to continually improve this plugin.

Frontend Loader

A minimal loading spinner for WordPress that enhances your site with app-like loading behavior.

rakib8373

Gmail Style Preloader is very lightweight preloader plug in. It will show a preloader screen until all of your page content loaded.
For live demo <a href="http://mrakib.me/odri/" rel="nofollow ugc">Click Here</a>

Gmail Style Preloader

This plugin will add gamil style preloader in your site.

Frontend Loader vs Gmail Style Preloader