Plupload is a tool for uploading files using Flash, Silverlight, Google Gears, and HTML5.

Plupload comes from the developers of TinyMCE, the ever-popular JS WYSIWYG editor, and thus can be considered a rather serious project.

Notable features include:

• Easy to implement;
• Drag&Drop support (FF and Chrome);
• Image resizing (PNG and JPG);
• Stream upload;
• Multipart upload;
• etc.

Goker Cebeci has published an awesome HTML5 Drag&Drop Uploader — just like the one used at Gmail.

The plugin uses a PHP server-side uploader and jQuery for achieving the desired effect.

You can use this plugin for any drag&drop operations you need in your web apps, plus, the plugin is rather easy to use, too.

Formaline is a nodeJS module for handling form requests (POSTs/PUTs) and for parsing file uploads.

What’s interesting about Formaline is that it supports real-time parsing of file uploads; tracks progress of file uploads; supports multiple file uploads; handles filename collisions and more.

Formaline is a plugin with which you could create a file upload service, not to mention a full-blown web app.

Go Pileus is a fast and free way to have files shared with whomever you want.

Go Pileus is a free service whereby you can upload files and have them available for download during 30 minutes. Any person you share the relevant links with will be able to get them.

Drag’n'drop support isn’t what you expect from file upload menus — well, except in Gmail, anyways.

However, there’s hope on the horizon as an awesome File Upload plugin with drag and drop support was just released by GitHubber blueimp.

This file upload plugin has a vast array of features, namely:

• Progress bars;
• Cancel-able uploads;
• Works without plugins (Flash);
• Allows cross-site uploads;
• Compatible with server-side apps (PHP, Google Apps, etc)

File upload is quite the innovative plugin, which will come in handy in a number of your projects in the future.

TRNSFR is an upload progress bar plugin for jQuery written by Gianni Chiappetta. TRNSFR’s main advantage is that it shows progress bars for multiple items.

The data sent to TRNSFR has to be gathered from an upload script (Uploadify, SWFObject, etc) as TRNSFR is an UI plugin.

TRNSFR can be customized to base upload progress on either chunks (files) or the total size of the upload.

A demo is available on the website.