CamTimer is a camera timer app designed to be as simple and efficient as possible. Just set the delay to 5 15 or 30 seconds and press the shutter 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 share or delete it.

You can also take 4 pictures in succession 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.

CamTimer is now completely free and open source. You can get the source code at https://github.com/dozingcat/CamTimer.