Here are some links that might be useful:
Go to Online Newspapers for links to local newspapers
Ecuador Volunteer Foundation, is a non-profit organization that offers volunteer work opportunities abroad in social, environment, educational and community areas around Ecuador. The main objective of our programs is to offer an experience of cultural exchange, as each one of our projects looks for work of brotherhood and help with local people.
Volunteer South America
Huge selection of free and low-cost projects in South & Central America