I've tested several Joomla download extensions, but I really do like JDownload. I don't know if it's hidden somewhere, but what I miss in JDownloads (and most similars, except OS Downloads) is an option for public download after leaving a mailing adress BEFORE download. Just to know who downloaded the file(s). And of course a menu-entry with an overview of all downloads, with mailing adresses and number of hits. It should not be that difficult, is it?