CamTimer

CamTimer is a camera timer app designed to be as simple and efficient as possible. Just press the 5, 15, or 30 second button to start the timer; at 3 seconds remaining you'll hear beeps, and then the picture will be saved. After you take a picture it will be shown full screen, allowing you to delete it or view it in the Gallery app.

You can also control the camera flash setting, switch to the front-facing camera if available (requires Android 2.3 or later), and take pictures without a delay.