I've been using Jetbrains' 0xDBE recently (https://www.jetbrains.com/dbe/) and I highly recommend it:
* it works with IDEAVim
* it uses JDBC so you can easily connect to "non-standard" DBs by using any JDBC driver
* it's better than psql/vsql/... for dealing with complex queries (you have a real editor rather than limited readline support, if you're lucky enough to have readline support)