These, among others, would be most userful: OpenSuse: https://bugzilla.opensuse.org/ ArchLinux: https://bugs.archlinux.org/ Would it be possible to just add these as "Other" if not recognised? Going through a process to add them seems a bit overkill. By the time these land in the list, the bug we're working on where these were to be referenced will most likely be closed too. Thanks!
Sourceforge too please, for example: https://sourceforge.net/p/gdcm/bugs/483/
Please contact the admins, as per the Help->Contact page, to have external trackers added.