- Nuru Organization
- Nyang'ombe Community Action Group
- NYENGEDI ENVIRONMENT DEVELOPMENT AND DISEASES CONTROL
- Oblige for Vulnerable Children Tanzania [OVCT]
- OCODE - Organization for Community Development
- OKOA COMMUNITY RELIEF SERVICES
- Old Nguvumali Women Centre
- One Light - Rwanda
- One World One Love Foundation
- organisation for child, youth and women empowerment support