Here are some useful links in the Christian reconciliation space:

Christian Resolution

The successor of Resolve Christian Service for Disputes Resolution Inc (1996-2016)

Relational Wisdom

Great free downloads and books for purchase from Ken  Sande’s ministry in the USA (author of The Peacemaker).

Peacemaker Ministries

Originally started by Ken Sande, his original (legacy) teaching resources are available free of charge.

Bible Gateway

A great resource for finding Bible verses and other study resources (some free, some pay-for). Bible verse links used on this site go to Biblegateway.com