Perpetual Mass Enrolments

The Redemptorist
Annual or Perpetual enrolment for masses to be said for living or deceased.

Basilica of Saint Francis of Assisi
Masses for Special Intentions; Perpetual Masses and Gregorian Masses

Capuchin Friars Australia
Seraphic Mass Enrolment, living or deceased, individual or family.

Here are a few free purgatorial societies you can enrol your deceased loved ones in 

Purgatory Project (for living as well)

For more perpetual mass enrolments online see this site