See links at the right for specific ministries.
“The unity of the Church is not uniformity, but an organic blending of legitimate diversities. It is the reality of many members joined in a single body, the one Body of Christ (cf. 1 Cor 12:12). Therefore the Church of the Third Millennium will need to encourage all the baptized and confirmed to be aware of their active responsibility in the Church’s life. Together with the ordained ministry, other ministries, whether formally instituted or simply recognized, can flourish for the good of the whole community, sustaining it in all its many needs.” (John Paul II, Novo Millennio Ineunte, no. 46)
"The ministries which exist and are at work at this time in the Church are all, even in their variety of forms, a participation in Jesus Christ's own ministry as the Good Shepherd who lays down his life for the sheep, the humble servant who gives himself without reserve for the salvation of all." (John Paul II, Christifideles Laici, no. 21)