Religious Action for Affordable Housing in Ann Arbor, Mich., works to increase the amount of affordable housing in a variety of ways. It has raised hundreds of thousands of dollars for the Avalon Housing project.

The Paul B. Henry Institute for the Study of Christianity and Politics, based at Calvin College in Grand Rapids, Mich., works to integrate the Christian faith and politics. Contact research fellow Corwin E. Smidt.

The Black Catholic Information Mall has links to numerous groups and organizations.

Somersault Group, in Grand Rapids, Mich., is a publishing consulting firm founded by a number of former executives at the evangelical publisher Zondervan. It is extremely knowledgeable about Bible publishing. View “The Bible on Steroids,” a presentation at the 2010 RNA conference.

The American Association of Pro-Life Obstetricians and Gynecologists and its 2,500 members and associates oppose abortion in general. Allan Sawyer serves as president.

The Population Studies Center at the University of Michigan is a leading resource for information about demographic trends in the United States. The center has access to dozens of scholars and experts. It has a page providing links to experts in specific fields.

The Jewish Historical Society of Michigan is in West Bloomfield. Gerald S. Cook is president.

The Evangelical Presbyterian Church is a conservative Presbyterian denomination started in 1981 consisting of more than 400 churches and 135,000 members. Contact the EPC through director of communication and information systems Dana Cadman.

The Oasis is a support ministry for gay Episcopalians. It has chapters in the dioceses of California, Missouri, Newark, Michigan, Rochester and New Jersey. Contact information can be found on each chapter’s website.