Upload

jQuery File Upload – jQuery Plugin with Multiple File Uploader Selection
jQuery File Upload is jquery plugin for multiple file uploader, drag&drop support, progress bars and preview images for jQuery. It’s Supports cross-domain, chunked and resumable file uploads. jQuery File Upload works with any server-side platform (PHP, Python, Ruby on Rails, Java, Node.js, Go etc.) that supports standard HTML form file uploads.

Free Web File Manager, Fully Integrated with Ajax Engine : KCFinder
KCFinder is an alternative to the CKFinder web file manager. It’s free, open-source and can be integrated into FCKeditor, CKEditor, and TinyMCE WYSIWYG web editors (or your custom web applications) to upload and manage images

Lightweight HTML5 Uploader for jQuery
jQuery HTML5 Uploader is a lightweight jQuery plugin that lets you to quickly add an upload system a-la-Gmail into your web app.

Multiple File Upload jQuery Plugin : jQuery File Upload
jQuery File Upload is an open source extensible jQuery plugin that supports multiple file upload with lots of useful features

Ajax Upload – A File Upload Script with Progress Bar,Drag n Drop
Ajax Upload is file uploader that uses XHR for uploading multiple files with progress-bar in FF3.6+, Safari4+, Chrome and falls back to hidden iframe based upload in other browsers, providing good user experience everywhere.

swfupload – JavaScript and Flash Upload Library
SWFUpload is a JavaScript Library that wraps the Flash Player’s upload function. It brings your uploads to the next level with Multiple File Selection, Upload Progress and Client-side File Size Checking.

Plupload – OpenSource Multiple File Uploader API
Plupload is an open source multiple file uploader that allows you to upload files using HTML5 Gears, Silverlight, Flash, BrowserPlus or normal forms.