Voz que Clama
- Tuis. Christian ministry describes their food, education, and assisted housing programs, with information on how to participate.
- http://vqcmission.com/

Christian Immersion Spanish Academy
- Tuis. Offers language instruction and volunteer work. [Requires Flash]
- http://www.cisacostarica.com

Edunamica Foundation
- Tres Rios. Education orientated and humanitarian initiatives and projects for children and youth. Includes a description of current projects and news.
- http://www.edunamica.org/

Costa Rica Rios
- Whitewater rafting, mountain biking and hiking throughout the region, with bed and breakfast based in Turrialba. Includes company history, experience of the guides, sample itineraries, and equipment information.
- http://www.costaricarios.com/