CornerClock for Mac

From ExcaliburWorld:

CornerClock is a desktop utility which provides the option of displaying a chiming clock in the top left corner of the screen. You can have the time or the date displayed by default (the other will display upon placing the cursor over the corner). You can also turn off the display and just use the chime functionality.CornerClock includes some chimes of it's own, and also loads the system sounds for optional chimes. You can add or change chimes to CornerClock by using ResEdit. Edit the "snd" resource. Chime sounds run from ID 140 through 199 (must be successive... when CornerClock detects an unused slot, it stops loading sounds). These chimes can be played at the hour, or 15, 30, and 45 minutes after the hour (with the option of playing different chimes at different time slots).