I want to have several locked-down workstations where a simple web app can run and users can't access much else. The machines will download large files from a remote server and need to then be able to detect and transfer the file to a user's plugged-in (USB, etc) or wireless (Bluetooth) device. I would like for the user to be seeing a simple web application, but since I need it to transfer files to a user's device I'm wondering if I should have a local web application running (e.g. on Tomcat) that handles all interaction with the user (except for when contact must be made with the remote web server) and can also somehow kick off some local code that will handle the transfer to the external device. Does this sound reasonable? Could I achieve this in some way other than using an applet? I mean, could the local web server kick off some code to look for the user's device and transfer the file?