Is there a way to list NetBeans editor hints?

Window --> Action Items will show you errors, warnings, and user-generated todo items.

I think you need to use the Tasks window.

To open the window, click menu Window → Tasks.

You can choose to look at the tasks/hints/errors for the

• file that you are currently editing
• the main project (and the projects that it depends on)
• all projects open in the IDE

As of NetBeans 7.2, there's a new "Inpect" window (go to Source > Inspect...) that will show all the hints for a project. You can also install additional inspectors, like FindBugs, and those hints will be included too.