Wicked Folders Pro is the perfect tool for managing large numbers of pages and custom post types.
Demo: https://wickedplugins.com/plugins/wicked-folders/
Real Media Library helps you with media management. Organize thousands of uploaded files into folders, collections and galleries.
Demo: https://codecanyon.net/item/wordpress-real-media-library-media-categories-folders/13155134
InfyLMS is a web-based solution where you can manage books of different categories, manage your internal users of different types and manage issues/returns of books easily.
Demo: https://codecanyon.net/item/infylms-library-management-system-laravel-reactjs/24884824
Premium bulk edit code has dramatically improved against the basic version and has been specially designed to process a true lot of media items.
Demo: https://wpuxsolutions.com/plugins/enhanced-media-library
Besides its beautiful design. Bicrypto is an incredibly rich core framework for you to showcase your App.
Demo: https://codecanyon.net/item/bicrypto-crypto-trading-platform-watchlist-kyc-charting-library-wallets-binary-trading-news/35599184
HappyFiles Pro let’s create & manage an unlimited number of media folders.
Demo: https://happyfiles.io
The professional WordPress document library plugin for your business or organization. Create, manage and display documents in minutes.
Demo: https://barn2.com/wordpress-plugins/document-library-pro/
Scientia is a beautiful, fresh and clean Public Library & Book Store WordPress Theme.
Demo: https://themeforest.net/item/scientia-public-library-wordpress-theme/24685526
Green LMS is a powerful library management system with which you can easily manage your library. It has over 25 functional modules and 6+ reporting modules.
Demo: https://codecanyon.net/item/green-lms-the-library-management-system/25602126
A very useful WordPress plugin for organizing thousands of your media files in your media library.
Demo: https://codecanyon.net/item/filebase-wordpress-media-library-folders/24335198