Head over to the downloads page on the website:
They are OS X and Linux “all-in-one” packages (they contain the Ruby interpreter, Dradis and all dependencies).
Changes from rc1:
sir but i didn’t understand how to install it can you please send me the detail and what are prerquisites required for dradis framework because i was confused which ruby versions i must use for dradis framework 3.0
@Rithesh you don’t need to worry about the dependencies, the packages contain everything in them, including the Ruby interpreter.