nAlertMe is an accelerometer-based freeware application that sounds a loud alarm when any movement is detected.
Usage

Press Options -> Activate alarm. 
Then you have few seconds to drop your phone before alarm activation.
To deactivate alarm you must put your phone in defined positions sequences.
To-do

This is a first beta and it need some improvements like:
User defined deactivation sequence
User defined alarm sound
Disable phone switch-off
...
Thanks

Symbian phone users for the idea
Donators for their support
Special thanks to P@sco for phones icons
Andrew Galpin for his help
History 
v0.1 (beta 1)
First release
v0.2 (beta 2)
RD Accelerometer DLL removed from sis package. Some people had troubles installing v0.1
(Thanks to Carlos from Venezuela for his early bug report).
v0.3 (beta 3)
You can now define your own sequence to deactivate alarm
Major bug at phone call fixed (thanks to testers over the net)