NEDO: Geothermal Energy Development Department
- Department of the New Energy and Industrial Technology Development Organization (NEDO). Includes data about research and development activities.
- http://www.nedo.go.jp/english/

European Geothermal Energy Council (EGEC)
- Promotes geothermal energy research and development. Includes news, events, details on joining and board of directors.
- http://www.egec.net/

Wikipedia: Geothermal Power
- Free encyclopedia article describing the concept of geothermal power. Addresses technical aspects, type of sources, electrical generation and cost.
- http://en.wikipedia.org/wiki/Geothermal

DOE: Geothermal Research Department
- Program of the U.S. Department of Energy (DOE). Focus on drilling, field testing and related technologies.
- https://cfwebprod.sandia.gov/cfdocs/GPI/

DOE: Geothermal Technologies Program
- Describes the U.S. Department of Energy (DOE) geothermal energy program. Includes facts and news.
- http://www.eere.energy.gov/geothermal/

International Geothermal Association
- Information on geothermal energy in use around the world, world conferences on geothermal, and links to related web sites.
- http://iga.igg.cnr.it/index.php

DOE: Geothermal Energy Program
- Research and development projects of the U.S. Department of Energy (DOE). Includes insights, technical data and publications.
- http://www.nrel.gov/geothermal/

Geothermal Energy Technology (GET)
- Document database. Includes bibliographic citations and publications.
- http://www.osti.gov/get/gethome.html

Energy Commission Geothermal Program
- Promotes geothermal energy development in California. Includes fact sheets, documents and data.
- http://www.energy.ca.gov/geothermal

DOE: Geothermal Energy
- Idaho National Laboratory of the U.S. Department of Energy (DOE). Includes information about use of geothermal energy, laws and standards, calendar of events and FAQ.
- http://geothermal.id.doe.gov/

New Zealand Geothermal Association
- Purposes include encouraging research, development and use of geothermal energy in New Zealand.
- http://www.nzgeothermal.org.nz/

Geothermal Resources Council
- Encourages worldwide research and development on geothermal energy resources and utilization. Calendar of events, workshops, membership information, publications, related links and other information.
- http://www.geothermal.org/

Deep Heat Mining
- Hot dry rock geothermal energy program in Switzerland. About the technology and the ongoing development program, including photos, maps, and diagrams.
- http://www.dhm.ch/