Here they are so far (I will add to the list as I find more):
* Brief for the American Hospital Association et al. as Amici Curiae in Support of Respondents with Respect to Medicaid
* Brief of Amicus Curiae the Disability Rights Legal Center in Support of Respondents and in Favor of Affirming the Constitutionality of the Medicaid Expansion Provisions of the Affordable Care Act
* Brief of National Health Law Program, American Academy of Pediatrics, Association for Community Affiliated Plans, Easter Seals, Inc., National Association of County and City Health Officials, National Association of Local Boards of Health, National Council on Aging as Amicus Curiae in Support of Respondents (Suggesting Affirmance on the Medicaid Question)
* Brief of the States of Oregon, Vermont, California, Connecticut, Delaware, Hawaii, Illinois, Iowa, Maryland, Massachusetts, New Mexico, and New York, and the Governor of Washington as Amici Curiae in Support of Respondents (Addressing Medicaid Expansion)
* Brief Amici Curiae of State Legislators from the Fifty States, the District of Columbia, and Puerto rico Supporting Respondents (Medicaid)
* Brief of David Satcher, M.D., Ph. D.; Alliance for Children and Families; American Association of People with Disabilities; American Association of University Women; Child Welfare League of America; Children's Defense Fund; the Education Trust; League of Women Voters; Methodist Healthcare Ministries; National Association of Girls and Women in Sport; National Council for Community Behavioral Healthcare; National Council on Independent Living; National Foster Parent Association; National Organization of State Associations for Children; North American Council on Adoptable Children; Paralyzed Veterans of America; Vet to Vet; Volunteers of America; Women's Sports Foundation; YWCA USA; and 59 Other Organizations as Amici Curiae in Support of Respondents
* Brief of Amici Curiae Health Law and Policy Scholars and Prescription Policy Choices in Support of Respondents on the Constitutional Validity of the Medicaid Expansion
* Brief of Services Employees International Union and Change to Win as Amici Curiae Supporting Respondents and Suggesting Affirmance on the Medicaid Issue
* Brief of Senate Majority Leader Harry Reid, House Democratic Leader Nancy Pelosi, and Congressional Leaders and Leaders of Committees of Relevant Jurisdiction as Amici Curiae in Support of Respondents (Medicaid)
* Brief for National Minority AIDS Council; AMFAR, the Foundation for AIDS Research; HIV Medicine Association; National Alliance of State and Territorial AIDS Directors; and Treatment Access Expansion Project as Amici Curiae Supporting Respondents (Medicaid)
* Brief of Amici Curiae Submitted on Behalf of Faithful Reform in Health Care and the WISC Health Care Working Group in Support of Respondent's Position on Medicaid
* Brief of Amici Curiae the Leadership Conference on Civil and Human Rights, Asian American Legal Defense and Education Fund, National AIDS Housing Coalition, National Economic and Social Rights Initiative, National Health Care for the Homeless Council, National Law Center on Homelessness and Poverty, Poverty and Race Research Action Council, Urban Justice Center and Wild for Human Rights in Support of Respondents Regarding Medicaid Expansion
