Yahoo! BrowserPlus™ is software that extends the capabilities of your web browser to make richer web experiences possible. Different websites can use BrowserPlus to support things like drag and drop from the desktop, easier file uploads, more efficient and secure acquisition of feeds and information, and native desktop notifications. BrowserPlus is a technology designed to "extend the web," so that developers can build more exciting web applications and so end-users can get more done inside their web browser.
It support's the following operating systems:
* Windows XP
* Windows Vista
* Mac OS X 10.4, Tiger (intel only)
* Mac OS X 10.5, Leopard (intel only)
On Mac it support's Firefox 2 (or greater) and Safari 3
On Windows, it support's Internet Explorer 7 and Firefox 2 (or greater).
Try this now : http://browserplus.yahoo.com/demos/photodrop/