Lambda Legal
http://www.lambdalegal.org/

National Center for Transgender Equality
http://transequality.org/

National Center for Lesbian Rights
http://www.nclrights.org/

Fair Michigan
https://www.fairmichigan.org/

Out Serve
http://www.sldn.org/

PARENTS, FAMILIES AND FRIENDS OF LESBIANS AND GAYS

https://pflag.org/

SAGE  Services and Advocacy for GLBT Elders
http://www.sageusa.org/

Equality Michigan
http://www.equalitymi.org/

LGBT Project ACLU Michigan

https://www.aclumich.org/en/campaigns/campaign-lgbt-equality-0

State Bar of Michigan and LGBTQA Section
http://connect.michbar.org/lgbtqa/home

Transgender Michigan
http://www.transgendermichigan.org/

In the Lansing MI area there is also a relatively new LGBTQ Resource and Community Center–the Salus Center.  See saluscenter.org for more information.