I use three tools interchangeably. DBeaver as mentioned by other comments. Squirrel SQL[0] has been around for a very long time. I have been using it for well over 10 years. Probably 15. Don't be fooled by the dated screenshots. First thing I always do it change the look and feel to Windows native then looks like any other Windows application. SQL Workbench/J[1]. Has tonnes of features, is well documented. I particularly like the headless mode which allows me to automate running of SQL statements using a batch file.

[0]http://squirrel-sql.sourceforge.net/ [1]https://www.sql-workbench.eu/