Association for Latin Liturgy
- Promotes the use of spoken and sung Latin in the liturgy. Based in the UK, invites membership from Catholics around the world. FAQ, publications, excerpts from newsletters.
- http://www.latin-liturgy.org/

We Believe!
- Volunteer organization and web site for Roman Catholic liturgical reform. Frames-dependent, and too big (too tall) for most monitors.
- http://webelieve.cc/

Adoremus
- A society lobbying for a re-examination of the reform of the liturgy since Vatican II to make it more in line with what was intended by the Council Fathers.
- http://www.adoremus.org/

Una Voce
- International organization promoting the Latin Tridentine Mass, Gregorian chant, sacred polyphony: articles, links, contact information.
- http://www.unavoce.org/

National Association of Pastoral Musicians
- Membership organization in the United States, dedicated to liturgical music. Several mailing lists, sponsors workshops for cantors and instrumentalists, holds conferences.
- http://www.npm.org/

Latin Liturgy Association
- Promotes the use of Latin in the liturgical life of the contemporary Church.
- http://www.latinliturgy.com/