I thought it'd be useful to create a list of projects looking for new maintainers: Maintainers Wanted.
If you know of any projects that should be added, feel free to make a pull request or write an issue!
Obviously trying to contact the author or previous maintainer of an abandoned project can be difficult, but then even this wouldn't help much as they'd still need to transfer ownership to the new maintainer(s). Maybe you could offer an 'ownership escrow service' for your target audience too. That would be potentially very helpful for people that really want to wash their hands of a project.
A person from nowhere will never became a maintainer of any serious product.
I find it hard to believe that a project you didn't create became something you actively wanted to support. On top of that, if the old maintainer really walked away completely, and they don't answer questions, you're walking through the dark.
It just was a great fit; I work on a PostgreSQL client; so it seemed like a good idea to help people get a server running too.
From my standpoint, it is shocking that such a popular and great gateway into the PG world is in this situation. Complex, enterprisey software is now just drag-n-drop and develop. Postgres.app is really good stuff.
You don't have a donate link, but if you're selling your front-end, please promote it.