DMGExtractor is described as 'lightweight Java application for extracting the contents of a Mac OS X Disk Image file (extension .dmg) to raw binary format (such as an ISO file)' and is an app in the CD/DVD Tools category. There are six alternatives to DMGExtractor for Windows, Linux, Wine and Mac. The best alternative is UltraISO. It's not free, so if you're looking for a free alternative, you could try AnyToISO or DMG Extractor. Other great apps like DMGExtractor are TransMac (Paid), dmg2img (Free, Open Source) and UUByte DMG Editor (Freemium).