Open Adoption and Family Services
- Private, nonprofit adoption agency with a focus on child-centered open adoptions.
- http://www.openadopt.org/

Open Arms Adoption Agency
- Agency licensed in Louisiana providing home study services for domestic, international, or special needs placements; birthparent and adoptive family counseling; and post placement visits.
- http://www.openarmsadoption.com/

One Church One Child Adoption Program
- Adoption program in Florida in association with Florida Department of Children and Families. Offering a photolisting of Florida's waiting Children.
- http://www.ococfl.org

One World Adoptions
- Non-profit, full service adoption agency licensed in the State of Georgia offering services including pre-adoption counseling, education, homestudies, assistance with dossier preparation, placement services and post placment services.
- http://www.oneworldadoptions.org

Open Adoption Services
- Brings mothers with an unexpected pregnancy together with qualified adoption families.
- http://www.open-adoption-services.com

Oklahoma Home Study
- A licensed agency that provides both domestic and international adoption home study services and adoption post-placement services for Oklahoma.
- http://www.oklahomahomestudy.com/