Problem scenario
You want a free trial or a completely open source (always free) graphical user interface application to install on your Windows desktop or laptop. What options do you have for a free front-end?
Answer
These GUIs are free or free to start out with an initial trial:
https://www.aquafold.com/aquadatastudio/trialregform
https://www.heidisql.com/
https://dbeaver.io/
https://www.devart.com/dbforge/postgresql/studio/
https://www.pgadmin.org/
https://omnidb.org/
Team SQL (formerly at https://teamsql.io/)
https://download.cnet.com/DbVisualizer/3000-10254_4-10202406.html
https://fishcodelib.com/database.htm