Steadyflow is a GTK+ based download manager that aims for minimalism, ease of use, and a clean, malleable codebase. It should be easy to control, whether from the GUI, command line, or D-Bus.
Install
Open up a terminal window from Applications ->Accessories menu,and install Steadyflow from PPA (for Lucid & Maverick):
sudo add-apt-repository ppa:sikon/steadyflow
sudo apt-get update
sudo apt-get install steadyflow
Or,you can get Steadyflow from Launchpad.