The Cloudbridge Project
- A private nature reserve created to preserve biodiversity in the tropical cloud forest adjoining the Chirripó Pacifico river on the slopes of Mt. Chirripó. Describes site ecology, the reforestation project, and research and volunteering opportunities.
- http://cloudbridge.org

Trees, Water and People
- TWP is an organization dedicated to helping communities develop sustainable forests and watersheds. Current programs in Honduras, Guatemala, and El Salvador, as well as a tree seed nursery operation in Guatemala. Take action this year to support the Jub
- http://www.treeswaterpeople.org