From Triple Triangle:
Raster Write enables graphics professionals to export raster versions of all or part of their InDesign documents. Raster WriteÃ¢??s Auto-Save feature also allows IT directors to automatically expose page proofs to customers, or administrative users.
In addition to standard Ã¢??manualÃ¢?? export, Raster Write can automatically export rasters whenever you save selected documents. Raster WriteÃ¢??s flexible Auto-Save Rules allow you to automatically maintain raster versions of selected documents for proofing by customers or internal use by administrative personnel.