There are many foundations in Costa Rica. The challenge is finding the right foundation to contribute towards. The following Costa Rica foundations are valuable in protection of the environment, human rights, and many other worthy causes:

Costa Rica Foundations:

Acceso Foundation: Committed to strengthening the Costa Rica society as a whole
AMBIO: Environmental law and research
APREDFLOFAS: Association for conservation of flora and fauna
Asoprocosarena Cano Negro: Protects Cano Negro Wildlife Refuge
Bosque Lluvioso Rio Costa Rica: Protects virgen rainforests in Costa Rica
Corcovado Foundation: Protects natural resources of the Osa Peninsula
Costa Rica Conservation Foundation: Dedicated to Costa Rica biological conservation
Costa Rica National Parks Foundation: Protects Costa Rica's National Parks
Eco Era: Protects 2,600 acres of rainforest on the Central Pacific
FIRE: Feminist interaction radio endeavor
Friends of Coco Island Foundation: Protects Coco Island
Friends of the Osa: Dedicated to the Protection of the Osa Peninsula
Fuprovi: Housing and shelter
Keto Foundation: Protects marine mammals and sea turtles
La Marina Wildlife Rescue Center: Animal Conservation
MarViva: Protects coastal areas and marine wildlife
Nature Conservancy: Environmental protection
Neotropica Foundation: Conserves the biodiversity of Costa Rica
Omar Dengo Foundation: Committed to improving education in Costa Rica
PROMAR: Protects marine wildlife and ecosystems
Restoring Nature Foundation, also Zoo Ave: Committed to restoring nature in Costa Rica
Rios Tropicales Foundation: Protection of waterways
Roberta Felix Foundation: Resources for disabled children in rural areas
Save the Manatee: Protects manatees and the habitat that they live in
Surfrider Foundation: Protects beaches from pollution
Talamanca Dolphin Foundation: Protects dolphins and people of Talamanca coastal areas
Tropical Science Center: Dedicated to the conservation of wildlife
Vida Marina Foundation: Protects coastal areas and marine wildlife off the Osa Peninsula