Here you will only find a limited number of links. Visit the below pages for many more!

DPIF - Dansk Pianostemmer & Instrumentmager Forening (Danish Pianotechnician Association)

NPTF - Norges pianostemmer og -teknikerforening (Norwegian Pianotechnician Association)

Suomen Pianonvirittäjät ry (Finnish Pianotechnician Association)

SPTF - Sveriges Pianostämmare & teknikerförening (Swedish Pianotechnician Association)

Europiano - European organisation of national associations

PTG - Piano Technicians Guild, USA, exstensive link collection!