The following script let you find any wordpress plugin and, obviously, the page parameters is key for the search.
For example in the case page=pods, you must enter into your wordpress docroot and execute:
cd wp-content/plugins
find . -type f | xargs grep add_menu_page | grep pods
You should see the file(s) matching the search (it should be only one) and the row matched. The row matched is related to the function call add_menu_page. This function creates a new top level menu section in the admin menu.
If you take a look at WordPress Reference for add_menu_page function, the third parameter $menu_slug is the key to understand how the things works, this is the page parameter.
*The slug name to refer to this menu by (should be unique for this menu). Prior to Version 3.0 this was called the file (or handle) parameter. If the function parameter is omitted, the menu_slug should be the PHP file that handles the display of the menu page content*