Your knowledge of English can show you the world…
TeachAbroad.com: A great site to help you find a teaching, intern or volunteer program abroad. You select the country, they provide results!
Footprints: A site dedicated specifically to placing ESOL instructors across the world. Many options are in Asian countries.
Teachingenglish.ca: This site provides a forum for employers to post teaching positions that need to be filled abroad. Select a continent and country and discover the options.
The JET Program: a government sponsored program for teaching English in Japan.
StudentTraveler: Teaching Abroad: Questions about teaching abroad? Want more information about the process or resources for finding positions? Hit this site and find the answers to your questions.