Right Zoom for a proper maximize

Historical text from HellasProject (2009–2014). It is not current advice or a present-day service.

Right Zoom is a great little app: the green (+) button actually fills the screen.

You can also resize with Command-Option-E (customisable). It changes zoom behaviour in Finder, Safari, Office, Pages, and so on. Hold Cmd at launch for options.

Download was on MacUpdate.