- Action of Churches Together in Scotland
- American Clergy Leadership Conference (ACLC)
- Bose Monastic Community
- Byzantine Discalced Carmelites
- Campus Crusade for Christ
- Canadian Council of Churches
- Christian Churches Together in the USA
- Churches Together in Britain and Ireland
- Churches Together in England
- Churches Uniting in Christ
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- Conference of European Churches
- Ecumenical Free Catholic Communion
- Ecumenical Gospel Mission of India
- Ecumenical Institute for Study and Dialogue
- Edinburgh Churches Together
- Fellowship of Saint Alban and Saint Sergius
- Franciscan Hermitage of Campello, Italy
- Holy Spirit Association for the Unification of World Christianity (HSA-UWC/Unification Church/Unification Movement)
- International Circle of Faith
- Iona Community
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- National Council of the Churches of Christ in the U.S.A.
- New Monasticism related Communities
- Pentecostal Charismatic Peace Fellowship
- Pontifical Council for Promoting Christian Unity
- Prairie Centre for Ecumenism
- Society of Ordained Scientists
- Taizé Community
- Word Made Flesh
- World Alliance of Reformed Churches
- World Council of Churches
- World Student Christian Federation
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