The Pentecostals & Charismatics for Peace & Justice, formerly the Pentecostal Charismatic Peace Fellowship, opposes war in the Pentecostal and Charismatic Christian communities. Contact administrator Natasha Rubin.

The Baptist Peace Fellowship of North America is the largest network of Baptist peacemakers in the world. Contact information manager Allison Paksoy.

The Presbyterian Peace Fellowship started in the 1940s as a group that provided support to conscientious objectors to World War II and continue to speak out against war. Rick Ufford-Chase is the executive director.

Christian Peace Witness is an ecumenical, group of partners who are committed to raising a Christian voice for peace.

Gregory Clapper is a professor of religion and philosophy at the University of Indianapolis and a National Guard chaplain. His research interests include Christian theology, ethics; philosophy of religion, Christian ethics, Christian spiritual formation, Wesleyan studies and church history.

Mars Hill Church in Seattle uses its own social network, The City, to keep members of its several campuses connected. Mark Driscoll is pastor.

The Catholic Diocese of San Jose, Calif., uses Facebook and Twitter to stay in touch with local Catholics.

Holy Cross Evangelical Lutheran Church of Fairfield, Ohio, uses Facebook to connect with its members and lists that under the church’s ministries. The church also links to the ELCA’s Imagine Yourself social network. Timothy R. Swanson is reverend.

Southwest Christian Church in East Point, Ga., uses its Facebook page for a variety of things, including evangelization.