AutoRenderSaver is LightWave Layout tool to automatically save all rendered images.
It's Layout Master plug-in which means it survives quitting Layout or scene clearing. Options set in user interface will be stored in LightWave settings.
Each time you will use F9 or Render Frame button, image will be saved on disk, without any feedback. It will save you time spend on picking up file format and name for every single test render, allow going back to some that were not saved because of f.e. crash etc. It will make sure that no file is overwritten automatically increasing counter and checking file existence.
You can read more or download plug-in here