LetterKeys (Win) Cost: $49.95 Get the full version     Trial version     Developer's Website Contacting third-party download site please wait. If your download does not start, click here, or get the full version Descriptions LetterKeys (Win): Flexible, on-the-fly FileMaker letter generation. With Letterkeys, you can give your users the ability to create endless variations on their letters, make one-time edit changes to letters without affecting the original template, add merge fields wherever they want them, create new merge field definitions  all this without once having to enter layout mode!