Magnet Window Manager - Magnet Developers
Hidden Bar - A ultra-light MacOS utility that helps hide menu bar icons.
Spectacle App - Move and resize windows with ease.
TramaTM - Protect your brand. Register your trademark. Free verification. Simple online process. Transparent price. Money back guarantee.
Moom - Move your mouse over the green zoom button in any window, and Moom's mouse control overlay will appear (as seen in the above animation).
Vanilla - Vanilla is a free Mac app that lets you hide icons from your menu bar.