International Trombone Association
- Dedicated to the advancement of trombone teaching, performance and literature.
- http://www.trombone.net/

All Trombones
- Based in Worcester and formed by trombonist Chris License, expect to find a list of links, PDF downloads of catalogs and selected trombone solos, diary of upcoming events, merchandise, newsletter, shop, mailing list, and contact information.
- http://www.alltrombones.co.uk/

The Historic Brass Society
- History of brass instruments, journal information, publications.
- http://www.historicbrass.org/

Trombonists' Anonymous
- A Yahoo! Group devoted to discussion about the trombone.
- http://groups.yahoo.com/group/trombonistsanonymous/

Finnish Trombone and Tuba Association
- Introduction to the group, contact details, concerts, and archives.
- http://www.musicfinland.com/brass/supatus/main.html

British Trombone Society
- Details about the society, history, membership information, officers, classified ads, and links.
- http://www.trombone-society.org.uk/