WinWarden provides you with a systray option for active window display control.

Lots of options to choose from here like move, maximize, minimize, restore, enable, disable, hide, show, on top, and bottom. You can also select always on top, clip, transparent, transparent color, move relative to another window. WinWarden can also permit you to stick to the edge of the screen, roll up and down, morph wide/tall/zoom in/zoom out depending on what you are working on. It additionally supports hotkeys as well.

WinWarden doesn't use many resources but provides a helpful tool for controlling your open windows, and it is portable so you can always have it when you need it. Set up is simple and utilization is equally so making it an excellent choice for any skill level.