Fliqlo Screensaver - A screensaver that displays the time using a flip clock.
Be Focused by XWaveSoft - Simple Pomodoro timer in your Mac's menu bar
Padbury Clock Screensaver - Minimal screensaver for Mac
Focusmate - Distraction-free productivity via virtual coworking
Really Slick Screensavers - Really Slick contains free 3D OpenGL screensavers.
Pomodoro Timer UWP - Be more productive with your time