International Association of
Double Star Observers
A quarterly journal of amateur astronomy dedicated to the study of double and binary stars
An amateur/professional society specializing in double stars and 'deep sky' objects. There is also a direct link to the Webb Deep-Sky Society Circulars.
Another fine society for amateur double star observers
An international network of amateur double star observers, based in Spain
The Spanish American League of Astronomy
An association of local amateur astronomical societies across the United States
Located near Barcelona, Spain and headed by Tofol Tobal, this organization has published over 10,000 visual double star observations in its "OAG General Catalog"
A Spanish language electronic double star journal begun in 2009
A new Italian language electronic double star journal begun in April 2012