- Institute of Applied Research
 - Nonprofit organisation, offering research and consultancy services to state, local government, and community. - Mid-East Area Center on Aging
- Providing services for older adults.
- Small World Adoption Foundation
- A not-for-profit, licensed child placing agency. Dedicated to assisting people who are eager to build loving families.
- St Louis Gender Foundation
- A resource group for crossdressers, transgenderists, transsexuals, androgynous individuals, and those who care about them.
- St. Louis 2004
- Citizen-based effort to make the St. Louis Region a recognised leader in the 21st century and enhance the quality of life for everyone.
- St. Louis Center for International Relations
- Strives to enhance the region's international profile and to foster exchanges in the areas of economics, commerce, education, technology, culture, and the arts.
- St. Louis Postal Customer Council
- Organisation seeks to increase the communication between postal customers and workers.
- St. Louis Teachers' Recycle Center, Inc.
- Collecting landfill-bound materials from local industry and providing them to teachers and parents.
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