If you are looking for a timer that is just a timer - not a stopwatch, not an alarm, but just a timer, then check out this little application by XDA forum member JD82.

It's a simple clean kitchen timer.  Easy to use and easy to read.

Originally posted by JD82:

• Close the app without stopping the timers.
• Presets saving (and soon import/export as csv).
• Alarm sound, notification led colour and vibration pattern customisation.
• Keep screen on during the countdown (optional, disabled by default).

Requires minimum Android 1.5 (Cupcake), and supports QVGA, HVGA and WVGA resolutions.

Kitchen Timer is free and available for download in the Market. On top of that, JD82 has also posted the source code on google's project hosting developer site.

For more information and where to view the source code, visit the application thread.