Note - copy and paste these links, they are not clickable 

These are working:
RAC 2014
RST 2014
RMEP 2014
Revit LT 2014 

To download, you could use admintool download as per this link, or just use any download manager.

Revit 2014 download link should be:
(not yet live, not working 3.30pm 1 April 2013)