"This special time, when all Christians are called upon to realise more profoundly their vocation to reconciliation with the Father in the Son, will only reach its full achievement if it leads to a fresh commitment by each and every person to the service of reconciliation, not only among all the disciples of Christ but also among all men and women".

From the Bull of indiction of the Jubilee Year of the Redemption Aperite Portas Redemptori, 3: AAS 75 (1983), 93.

See also:  John Paul II's Post-Synodal Apostolic Exhortation Reconciliation and Penance 

Since the first truth commission was formed in Uganda in 1974, the truth and reconciliation concept has developed into an effective global strategy for dealing with war crimes and other human rights abuses. It has been used extensively in Latin America to investigate patterns of abuse such as “disappearances.”

Two interesting projects in Northern Ireland showcase strategies for inclusive cross-border and cross-cultural education and community development. One is the Education for Reconciliation Project; the other is the Ireland Initiative of the Mastery Foundation.

"Bridging the gap between peoples . . .
Healing the wounds of society"

is the motto of The International Reconciliation Coalition. It  offers four healing steps to implement it: Confession, Repentance, Reconciliation and Restitution.

The Catholic tradition has always cherished Reconciliation/Penance as a sacrament. The authentic teaching on the sacrament appears in The Catechism of the Catholic Church. There are two forms in which the sacrament normally takes place: one is a Communal Penance Service; the other is Individual Reconciliation. 

See more on The Sacrament of Reconciliation.