The KDE panel is a key player in my efficiency scheme. You can stuff all kinds of things into the Panel, arrange them however you like, and even have multiple panels.
Click anywhere on your main desktop to close the panel configurator, or press the Esc key. Then you can right-click on any widget to open its configuration dialog.
Plasma 5.0 introduces a new major version of KDE’s workspace offering. The new Breeze artwork concept introduces cleaner visuals and improved readability. Central work-flows have been streamlined, while well-known overarching interaction patterns are left intact. Plasma 5.0 improves support for high-DPI displays and ships a converged shell, able to switch between user experiences for different target devices. Changes under the hood include the migration to a new, fully hardware-accelerated graphics stack centered around an OpenGL(ES) scenegraph. Plasma is built using Qt 5 and Frameworks 5.