Haunted House Association
- Established to assist and advance the haunted house industry through communication, education, and information.
- http://www.hauntedhouseassociation.org/

Howling Wind Productions, Inc.
- Specializes in haunted house design and production, filming, costumes and props. Includes photos and movies. Located in Michigan.
- http://www.howlingwind.net/

Oak Island Entertainment and Productions
- Featuring haunted house attractions, scare products, and special effects for parks and zoos.
- http://www.oakislandinc.com

Dark Attraction Productions
- Full service haunted attraction/haunted house design and construction. Based in Hesperia, California.
- http://www.darkattraction.com/

Midnight Productions
- Specializes in design, production, and operation of dark attractions. Operates three large portable haunted houses.
- http://www.midnightproduction.com/

Haunted Attraction Magazine Online
- E-zine for the terror and horror attraction industry.
- http://www.hauntedattraction.com/

Haunted Productions Online
- Creators of the Dungeon Haunted House.
- http://www.hauntedproductions.com/

Halloween Productions Inc.
- Operates haunted attractions throughout the United States. Also markets related equipment and materials.
- http://www.halloweenproductions.com/