- SHIRIKA LA MAENDELEO, MAWASILIANO NA KUONDOA UMASKINI TANZANIA
- SHIRIKA LA WANAWAKE KATIKA ELIMU (SWE)
- SIHA DEVELOPMENT ORGANIZATION
- SIMBA MASAI THEATRE GROUP
- Small Miners Development Initiatives (SMDI)
- sober tanzania
- Social Awareness and Live Support (SALISU)
- SOCIAL AND ECONOMIC DEVELOPMENT INITIATIVES OF TANZANIA
- Social Mainstreaming for Gender Equality Organization
- SOCIAL MOMENTUM ORGANIZATION