Cardfile is a curses-based cardfile program compatible with the files produced by Microsoft Cardfile for Windows. It has been tested on Solaris (SysV curses), Linux (ncurses), and Mac OS X (ncurses). It includes reverse-engineered documentation and Microsoft-supplied documentation on all three CRD formats. The release is endian clean and there are no known bugs. It allows maintaining Windows address books without having to boot up Virtual PC.