- Treesearch, a new database that allows access to Forest Service research publications online.
- National Alliance for Community Trees, a national coalition of organizations dedicated to the same cause – restoring community forests for the benefit of all people
- TreePeople, the Los Angeles urban forestry non-profit
- Friends of the Urban Forest, the San Francisco urban forestry non-profit
-
- USDA Urban and Community Forestry Northeast region
- Southern Center for Urban Forestry Research
- American Forests
- National Tree Trust
- National Arbor Day Foundation
- US National Arboretum
- Green Infrastructure planning and conservation resource
- Low Impact Development Center
- Center for Watershed Protection