pluppload.com
Plupload: Multi-runtime File-UploaderAt its core Plupload is visually flat and you can customize it however you like. Check these out for various usage cases. Documentation is much better now. Available under GPLv2 and OEM licenses. We are using HTML5 APIs. Always. Plupload is based on multi-runtime pollyfills for XMLHttpRequest L2. And Image APIs. So when there's no HTML5 available in the browser, we emulate it ourselves. MOxie (combined code-name for pollyfills) is completely standalone and available separately. Access Raw File Data.
http://www.pluppload.com/