Moo0 WindowMenuPlus lets you have extra useful menus in every window's "system window menu".
It's the menu that you can access through right-clicking on any window's title bar or taskbar button. This tool can add extra menus there such as "Keep on Top", "Transparency Adjustment", "Various Information about the Program" ,"Process Priority Adjustment" and so forth.
Also, you can configure not to show some menus that you don't use. You can enjoy only useful menus that you want.