Rational Developer for IBM i Screen Emulator
Of course we can install any of the other IBM i 5250 Emulators listed in this course... but if you are lucky enough to be so rich you can afford to buy RDi yourself, or lucky enough that your employer has coughed up the $thousands for you and your team, then you can signon from within RDi itself.
Just right-click your IBM i system and then click on Host Connection Emulator.