| Centre for Research in Energy and Energy Conservation (CREEC) | Academia |
| Centre for Rural Energy Promotion and Environment Technology Service (CREPETS) Pvt. Ltd. | Private Industry |
| Centre for Rural Enlightenment, Salvation for Health & Environment (CRESHE) | Non-Governmental Organization |
| Centre for Rural Technology, Nepal | Non-Governmental Organization |
| Centro de Ecologia y Genero (Centro ECO) | Non-Governmental Organization |
| Centro de Información en Energías renovables - CINER | Non-Governmental Organization |
| CeTAmb | Academia |
| Chardust Ltd. | Private Industry |
| CHF International | Non-Governmental Organization |
| Child Welfare Scheme | Non-Governmental Organization |
| China Agricultural University's Energy Engineering and Low Carbon Technology Lab/Renewable Resources Lab | Academia |
| China Association of Rural Energy Industry (CAREI) | Non-Governmental Organization |
| Chinansi Foundation | Non-Governmental Organization |
| Chip Energy | Private Industry |
| Chittagong Social Development Forum | Non-Governmental Organization |
| CINER - Centro de Información en Energías Renovables | Non-Governmental Organization |
| Clean Air Initiative for Asian Cities (CAI-Asia) Center, Inc. | Non-Governmental Organization |
| Clean Air Sri Lanka | Non-Governmental Organization |
| Clean Compassion | Non-Governmental Organization |
| ClimateCare | Carbon Project Developer |
| Climatefarming | Independent Consultant |
| ClimatePath | Independent Consultant |
| CO2focus AS | Carbon Project Developer |
| Colorado State University Engines and Energy Conversion Laboratory (EECL) | Academia |
| Columbia Univeristy - Biomass Working Group | Academia |
| Concern Worldwide, Bangladesh | Non-Governmental Organization |
| Conservation Action Trust | Non-Governmental Organization |
| Consulting for Health, Air, Nature, & a Greener Environment, LLC (CHANGE) | Private Industry |
| Cozy Environment Kenya | Academia |
| CSIR-Food Research Institute | Government |
| CVS Consulting (Africa) | Independent Consultant |
| D.&E. Green Enterprises, Inc. | Private Industry |
| Daasgift Quality Foundation | Non-Governmental Organization |
| Davao Region Coconut Industry Cluster, Inc. | Non-Governmental Organization |
| Department for International Development (DFID) | Government |
| Desert Research Institute | Academia |
| Deutsche Gesellschaft für Internationale Zusammenarbeit (GIZ); HERA - poverty-oriented basic energy services | Government |
| DEVA ACCESS AND EMPOWERMENT INT'L LTD/GTEE | Non-Governmental Organization |
| Development Alternatives | Non-Governmental Organization |
| Development Concern | Non-Governmental Organization |
| Development Technical Assistance Services | Independent Consultant |
| Developmental Association For Renewable Energies (DARE) | Non-Governmental Organization |
| Die Ofenmacher e.V. | Non-Governmental Organization |
| Division of Energy, Ecology and Environment, Center for Science and Technology Development, Chinese Ministry of Agriculture | Government |
| Doctors with Africa Trustee Tanzania | Non-Governmental Organization |
| Dolen Ffermio (Farming Link) | Other Organization Type |
| Dometic AB | Private Industry |
| Dr. Margaret Njirambo Matinga - Independent Consultant | Independent Consultant |
| Dread & Works Enterprise | Independent Consultant |
| E+Co | Non-Governmental Organization |
