Cenrut is a community-based project to create and freely distribute GPS maps of Central America. The project covers Belize, El Salvador, Costa Rica, Nicaragua, Guatemala, Honduras, and Panama.

Cenrut 3.0 is a major upgrade and is available in formats for Garmin(PC+Mac), Navitel, CityGuide and 7Ways:

http://www.cenrut.org/adw/over.htm