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
XScreenSaver - XScreenSaver is the standard screen saver collection shipped on most Linux and Unix systems running...
Pomodoro Timer UWP - Be more productive with your time
Really Slick Screensavers - Really Slick contains free 3D OpenGL screensavers.