[Unsure why Discourse marked this message as spam and hid it. Also gave me instructions to edit the post to unhide it]
Isotammi[1] seems to be a project not person, part of the Taapeli
project[2] and there are several plugins on that Github site. The
“Isotammi Configuration” project is interesting - allows searching for
new/updated addons either from Isotammi or the default Gramps repository
without having to change the URL each time. Would it make sense to
functionality built-in to Gramps to add multiple repositories to search
for add-ons?
[1] GitHub - Taapeli/isotammi-addons: Gramps addons for Isotammi project / Isotammen Gramps-lisäosia
[2] Taapeli project · GitHub