DBeaver: https://dbeaver.io/
Native cross-platform and works across dozens of databases with lots of features.
Another option is Jetbrains DataGrip: https://www.jetbrains.com/datagrip/
Native cross-platform and works across dozens of databases with lots of features.
Another option is Jetbrains DataGrip: https://www.jetbrains.com/datagrip/
I prefer to use HeidiSQL running on Wine.
I've inadvertently become the pgadmin 3 "LTS" maintainer. A release of pgadmin 3 that was altered to support 10.x was previously provided by BigSQL. I forked it on GitHub to add TCP keepalive on client connections. At some point after that BigSQL removed the original repo. Apparently I was the only one that had forked it prior to removal, so now the few vestigial users in the world still using it are forking my fork. One has even patched it to work with 11.x, although they've offered no pull requests.
Amusingly it appears the previous maintainer, BigSQL, has since forked my repo.