CheckCalls is a small utility (daemon-style) that can check incoming calls on your mobile phone, and do some actions if the name or number matches to a list.
I've developed this little tool basing on some kmobiletools code, but since it's written in pure c++, it doesn't depend from QT or KDE. It should run on almost every POSIX compliant environment (but i didn't test it, anyway).
I'm using it to wake up my desktop by calling my second phone number... anyway the config file is a bash script, and probably is easy enough to match every needings.
You can find the download link to the left Downloads box.
2006/06/07 update: added Makefile (thanks Francesco Pedrini)