Easy to use Ghostscript IDE. (supported 32-bit and 64-bit environments). Contains Ghostscript Processor Workspace which allows you to use Ghostscript (gswin32/64.exe like) switches in more friendly way. Comments/descriptions in any part of the document are allowed. It has PostScript Editor Workspace which allows you to edit PostScript files on the left side of the window and to see a preview of the interpreted result on the right side of the window.
gspr - Ghostscript Studio Processor file extension
PDF-to-PNG sample can be opened only from Ghostscript Studio.