Job Keeper is a simple FileMaker Pro based database that helps you gather and store potential employer information and also create a 'letter of interest' simply by entering information about the job, employer, and yourself. It gives you a simple pre-tax idea of what you'll get per week also. This is no marvel of database creation but it can be helpful and its free. Someone asked me for this a week or so ago and so I dug the old project up and released it. Documentation is on the way.
Added is support for FileMaker Mobile 2.0 or higher to aid in gathering and syncing database information while you're actually out pounding the pavement. FM
FileMaker Pro 5.0 or later I suggest you use Mac OS X (any version capable of FileMaker Pro 5.5). FileMaker Mobile 2.0 or later for use with your PALM device.