WebDev: What is the best way to do a multi-file upload?

Question

I want (barely computer literate) people to easily submit a large number of files (pictures) through my web application. Is there a simple, robust, free/cheap, widely used,

Answer 1

I found that the best way to upload a bunch of files is to zip them and upload a single file (and then decomress it on server). However that's probably not a good option for the audience you are targeting.