TablePlus

TablePlus is a tool for viewing the content of a database:

https://tableplus.com/

I prefer it over the prehaps more powerful DataGrip for the reasons here:

https://tableplus.com/blog/2018/10/navicat-vs-datagrip-vs-tableplus.html

Since that post a plugin for entity diagrams has been added to TablePlus:

https://github.com/TablePlus/TablePlus/issues/44