Online Translator Website: http://www.rikai.com/perl/Home.pl

For Mozilla Firefox users (add-on):

Rikai-chan download: https://addons.mozilla.org/en-US/firefox/addon/rikaichan/

For Google Chrome users (extension):

Rikai-kun download: https://chrome.google.com/webstore/detail/jipdnfibhldikgcjhfnomkfpcebammhp