Non-Government or Civil Society Organisations
- SAATHI
- see Solidarity and Action Against the HIV Infection in India (2000 - ) - Save the Children Australia
- Save the Children International Alliance
- see International Save the Children Alliance (1997 - ) - Save the Children UK (1919 - )
- Seven Sisters (2001 - )
- Seventh International Congress on AIDS in Asia and the Pacific (2005)
- Sixth International Congress on AIDS in Asia and the Pacific (2001)
- SMARTWork Project
- Solidarity and Action Against the HIV Infection in India (2000 - )
- Soros Foundation
- see Open Society Institute (1993 - ) - Spiritia
- see Spiritia Foundation (1995 - ) - Spiritia Foundation (1995 - )
- Street Friends
- see Mith Samlanh (1994 - )