LifeTeen
Life Teen is a movement within the Roman Catholic Church, Life Teen leads teenagers and their families into a deeper relationship with Jesus Christ and His Church.

Discipleship Focused Youth Ministry
DFYM is an approach that focuses in on Discipleship and uses the fruits of Discipleship to make more disciples.  This is the approach that Christ taught us.  While having the vision to reach the entire world, He did so by investing in a few (His Disciples).  Those Disciples then invested in others (Discipleship) in order to make more Disciples.

ProjectYM.com
ProjectYM exists to equip Catholic youth ministers for success

Young Life
Young Life doesn't start with a program. It starts with adults who are concerned enough about kids to go to them, on their turf and in their culture, building bridges of authentic friendship. These relationships don't happen overnight — they take time, patience, trust and consistency.  Simply put, the mission of Young Life is introducing adolescents to Jesus Christ and helping them grow in their faith.  Young Life is a Christian organization, not a Catholic one.  Here is an article on why Catholic dioceses are teaming up with Young Life.  Here is a blog post on Young Life's attempts to build bridges with Catholic dioceses.