I use this all the time now, especially when seeing how much light is left in any given day. This way I dont have do any math in my head after spending time looking for a sunset time. This clock has times too, but the graphics make it do easy to see "day" and "night" that you dont need any numbers! Also interesting from an astronomical standpoint, seeing the lighting differences from season to season, all depending on ones latitude.
And the added moon phases makes it even more awesome!
billery about Daylight, v1.6.0