Download Element for Zoo
It is pretty much the same as the original download element, but allows you to restrict the download to registered users. If a user is not logged in, then "login" is displayed instead of "download", but the button is still visible.
I am not sure whether this element would work well on non-English sites, but you can change the code in any way you want :-)
You can install the element with the standard Joomla installer.
v1.5.13: add Uikit template
v1.5: Joomla 2.5 bug fix
v1.4: Zoo 2.6 compatibility
v1.3: Zoo 2.5 compatibility (dropped Zoo 2.4 support)
v1.2: added supported for Joomla 1.7
v1.1: updated element for Zoo 2.4.9
v1.0: initial release