Menus

Menus are lists you can pop up from binding or hook to a start menu on a panel. Menus can be used to list programs or even be created dynamically so you can list the contents of a directory, a recent applications menu, etc.

Read more: https://www.fvwm.org/Wiki/Config/Menus/

Available Menu examples:
https://rasatpc.net/fvwm-ext/index.php/List_of_Menus