- American Association of Fund-Raising/Council Trust for Philanthropy
- Foundation Center
- Foundations On-Line
- Environmental Grantmakers Association
- Grantmakers in Aging. An affinity group representing local, regional and national funders that share an interest in improving the lives of older adults. Includes a number of foundations focused on elderly health issues.
- Grantmakers in Health
- Hospital Conversion Foundations (see discussion under Hospital Conversions)