Vanilla is a free Mac app that lets you hide menu bar icons.

Moom makes window management as easy as clicking a mouse button—or using a keyboard shortcut, if you're one of those types of people. With Moom, you can easily move and zoom windows to half screen, quarter screen, or fill the screen; set custom sizes and locations, and save layouts of opened windows for one-click positioning. Once you've tried Moom, you'll wonder how you used your Mac without it.

Multitask with ease. Helium is a floating browser window that allows you to watch media while you work. Your content will never fall behind your other windows even as you switch tasks.