SWFUpload

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. Unlike other Flash upload tools, SWFUpload leaves the UI in the developer's hands. Using a set of event handlers developers can display upload progress and status to the user in their own HTML/CSS UI. SWFUpload has been featured in such projects as YouTube and WordPress.