prefer simply HTML, with CSS (can be html5), or even with Jquery or Ajax if necessary.
Want to have a list of 10-20 file name options
The ability to use a checkbox in front of each to select
Click 1, 2, 3+ of the items (zip files)
After selection, with one button/link, download the selection of files.
(using html,js only, not PHP or ASPx)