cid is a utility used to log caller-id info into a file. The utility was derived from jwz's cid.pl and has been modified to suit my needs. The utility logs the calls to a file and I have a cgi script which generates a web page from the file. Right now the cid only supports the US Robotics Courier modem.
If you feel that you have a need for a tool like this then feel free to download it below. But be warned that this is pure hackerware so don't expect it to work for you without some tweaking and of course you need to be using linux or some variant of *nix system unless cu has been ported to Win32.