FF14 Windower
About
First off, let me state that this application is NOTHING like Windower for FFXI with all its bells and whistles for Addons.
All this aplication does is take an already windowed game (using SE's windowed mode option) and reposition the game so that the borders are off of the screen. This gives it a psuedo full screen effect like FF11 Windower did and like other games Full Screen Windowed mode options.
There is no injection involved, no memory read or memory written. this app only moves the window so the title and borders are off screen since windows doesnt like to let you do it yourself.
Using
Simply enable Windowed mode in FFXIV config, and set the game resolution to MATCH your desktops resolution (ie if you are using 1920x1080, your FFXIV must be 1920x1080)
Next, simply run FFXIVWindower.exe and open the game manually and login.
This app will simply run in background and move the window any time it finds it. So you can run once when starting PC (ie put it in your Startup Folder in Start Menu) and forget it. It stays running in background using 0 resources and will do its thing every time you open your game.