Chrono allows you to create a timer in seconds and shows the remaining time in your menu bar. Great for time boxing or general purpose timers to boost productivity. There’s also a log where you can analyse how you’ve spend your time.
ClockDesk is a menu bar app that places a beautiful and practical date and time display right on your own desktop wallpaper. You have the ability to customize the clock’s appearance in terms of font, colors, and size.