http://adeona.cs.washington.eduThis program is for the case that your laptop is stolen.
This software periodically run on background, gather network information and give you some hints where your laptop is.
The website recommend you do *not* try to catch the thief by yourself even when you find out where it is.
One interesting thing is the software can take a picture of the thief when your computer is MacBook series, which has a camera at top of the LCD.
The logic was simple, so that I made similar one by myself.Using my shell program will get some network information and picture file onto your email box every half hour; you may be able to use some "filters" for the spam-like emails.In order to use this, you need to set your email address on the script file, "email", and install two software: iSightCapture, mutt.
I don't know which way is easiest way to install mutt, but I used "Mac Port".
You can add a schedule onto your "crontab" like this:
0,30 * * * * /Users/wrice/Applications/sendPicture.shEnjoy your safer environment.