An admin shouldn't be in the business of cracking passwords, but this can be the only options when employees leave and take their password with them. Ophcrack is capable of loading passwords' hash codes directly from a Windows (XP or Vista) machine or from a file. The application includes large rainbow tables to scan with those hash codes, promising to return a missing password with impressive accuracy. Ophcrack also installs on Linux/Unix and Mac OS X; a LiveCD version runs directly from the medium, no install needed.Perhaps Ophcrack won't be the most used tool in your drawer, but it is one that can save the day.