OSDownloads is the easiest way to add downloads to Joomla.
OSDownloads gives you an easy and reliable downloads directory. It also integrates directly to MailChimp and Constant Contact so you can collect emails in exchange for downloads. Use OSDownloads to build your newsletter subscribers or have emails on file so that the users who download can be contacted later.
The Pro version of OSDownloads comes with over a dozen extra features including email validation, requesting Tweets or Facebook Likes for downloads, Publish / Unpublish dates for downloads, integration with Joomla articles and much more!