As mtr starts, it investigates the network connection between the host mtr runs on and a user-specified destination host. After it determines the address of each network hop between the machines, it sends a sequence ICMP ECHO requests to each one to determine the quality of the link to each machine. As it does this, it prints running statistics about each machine. For a preview take a look at the screenshots.
mtr is distributed under the GNU General Public License. See the COPYING file for details.
Official site http://www.bitwizard.nl/mtr/