Padbury Clock Screensaver - Minimal screensaver for Mac
CleanMyMac X - Clean, protect and speed up your Mac
Clock.saver - A simple clock screensaver based on Braun watches ⌚
DaisyDisk - DaisyDisk is a disk analyzer tool for OS X that visualizes hard disk usage and allows to free up hard disk space.
iScreensaver - iScreensaver is a multi-featured software that uses Image, Live Photo, Video, Movie, and 3D Model files to create screensavers for Windows and Macintosh.
Fossils - Find and clean out all your old unused files