I don't really know if this is that much better, but even though they don't have a DIA_0_97_3
tag like they do for Dia 0.97.2, the latest version actually seems to be 0.97.3 which was released in 2014.
Dia had a release 3 months ago and was updated last week. It's not abandoned. It's a gnome app. They aren't throwing it in the shitheap anytime soon.
Hi /u/Synes_Godt_Om, I know this is a fairly old thread, but just in case you are still interested, I thought I should reply.
Dia is starting to be maintained again: the current official repository is https://gitlab.gnome.org/GNOME/dia/commits/master
Current activities include port to meson build system and gtk3.
We are looking for any help we can get and welcome pull requests, feedback, etc. For more information, please feel free to ask on the mailing list: https://mail.gnome.org/mailman/listinfo/dia-list
Hope this helps!