* Apug (Analog Photography Users Group)

http://www.apug.org/forum/home

* Fadu (Film & Darkroom User)

http://www.film-and-darkroom-user.org.uk/forum/

* Photo Net (Film & Digital User Forums)

https://www.photo.net/community/

* Rangefinder (Film & Digital User Forums)

https://www.rangefinderforum.com/forums/forumdisplay.php?f=61

* RH Designs (Darkroom Equipment)

http://www.rhdesigns.co.uk/