Rathkamp Matchcover Society — RMS is the premier organization for collectors worldwide; https://www.matchcover.org
The Matchcover Vault – excellent reference site for the hobby; https://www.matchpro.org
Website of Flemming Hennigsen — website of well-known collector from Denmark displaying much of his extensive collection; http://phillumeny.dk
Oh, What a Match — website of two Swiss-based collectors by way of New York presenting an interesting view of collectors and the hobby in general; ohwhatamatch.com
Angelus Matchcover Club — nice story in the LA Times about this club in southern California; https://www.latimes.com/lifestyle/story/2023-11-20/vintage-matchbook-collectors-club-los-angeles
Get Matches – matchbook distributor who has revived the retro feature matchbooks that have become quite popular; http://www.getmatches.com