The Institute of British Organ Building
- Professional association of British organ builders. Directory of members, description of services and publications for sale,
- http://www.ibo.co.uk/

Huddersfield Organists' Association
- Articles and other items of interest to those concerned with organs and organ music. Also a pipe organ archive especially local to West Yorkshire.
- http://www.hudds.org.uk/

Redundant Organ Rehousing Company Ltd.
- Relocates used pipe organs in the UK List of organs and pipes for sale.
- http://www.rorcl.co.uk/

Organ Clearing House
- Organization which relocates older pipe organs. Site has contact information and photos of some organs available for sale.
- http://www.organclearinghouse.com/

British Institute of Organ Studies
- Society which promotes historical research, conserves the sources and materials for British organ history, and works for the preservation of these instruments. Site includes list of programs and online newsletter.
- http://www.bios.org.uk/