Actual Windows Manager keeps track of all the configuration changes you make to each individual window and applies the changes automatically on the fly! This means you can specify which additional buttons to display for each window on the system (including menus and Taskbar itself) as well as you can set the individual transparency level.
Want some sugar on top of that? The application operates semi-automatically, which means you won't have to spent hours trying to figure out how it works. Its rule-based logics are rather native to human mind.
