- SOCIO-ECONOMIC DEVELOPMENT TRUST FUND
- soko kuu saccos ltd
- Songambele Initiative Organisation
- Songea Women and children care organization
- Southern Africa Human Rights NGOs Network Tanzania Chapter
- Southern Corridor Development Association (SOCODEA)
- SOUTHERN HIGHLAND SENILITY ORGNISATION
- Special Development Organisation
- Special educators for disabled and orphans
- special educators for disabled and orphans organization