- Society Empowerment Agency
- Society for Service to Rural Development in Tanzania
- SOCIO-ECONOMIC DEVELOPMENT TRUST FUND
- soko kuu saccos ltd
- Southern Corridor Development Association (SOCODEA)
- SOUTHERN HIGHLAND SENILITY ORGNISATION
- Special Development Organisation
- Special educators for disabled and orphans
- SPORT COMPANY FOR STRUGGLE AGAINST AIDS/HIV and DRUGS (SCAAD)
- SPORTS ENVRONMENTAL HIV/AIDS PROGRAMME