clock in center

The iTunes Alarm Clock and Sleep Timer

MyMenuDate offers a fully customizable system menu bar clock and calendar.

Another Mac OS X screensaver featuring a glowing neon clock!.

Screensaver that shows a typographic clock

MagiCal is a FREE menu-based clock and calendar

Pester is a simple alarm clock and timer for Mac OS X

Use your Mac as an alarm clock and wake up to your favorite music.

Freeware stopwatch, alarm clock and countdown utility for Mac.

Customize the clock to display exactly what you need and how you want it to look

Awaken is a digital alarm clock that uses iTunes for waking you.