... I send out a list of most interesting libraries and apps in the "PHP" section to about 1100 subscribers.
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Embed Any Document WordPress plugin lets you upload and embed your documents easily in your WordPress website without any additional browser plugins like Flash or Acrobat reader. The plugin lets you choose between Google Docs Viewer and Microsoft Office Online to display your documents.
Multiple File Upload with PHP
File Upload widget with multiple file selection, drag&drop support, progress bar, validation and preview images, audio and video for jQuery. Supports cross-domain, chunked and resumable file uploads. Works with any server-side platform (Google App Engine, PHP, Python, Ruby on Rails, Java, etc.) that supports standard HTML form file uploads.
A simple Symfony bundle to ease file uploads with ORM entities and ODM documents.
This PHP class uploads files and manipulates images very easily. It is in fact as much as an image processing class than it is an upload class. Compatible with PHP4, 5 and 7. Supports processing of local files, uploaded files, files sent through XMLHttpRequest.
Browse directories and upload documents using Zend Expressive
With the module student folder (mod/publication) students can upload documents which can be made visible by teachers.
Allows users to upload, manage, search, and download publications, documents, and similar content (PDF, Power-Point, etc.) in WordPress.