There's no shortage of clocks and timers for the iPad. One of the most complete is Clock Pro for the iPad, which is on sale this weekend for US$1.99.
Clock Pro is an alarm clock and uses notifications so you can get that important wake-up alert without leaving the app running. There is both an analog and digital clock design, a chess clock, a world clock, sunrise, sunset and tide clocks, a sleep timer, an egg timer and a countdown clock. Most clocks can run full screen and are beautifully rendered. We took a brief look at this app last year when it was $5.99 and gave it a positive review. Now it supports multi-tasking, and it's 4 bucks cheaper.
A couple of caveats. The app can't wake you to
