Windows: Ever end up with a really weird disc image (MDF? PDI? B6I?) and no clue how to get at it? ISOBuddy is there for you. It burns or converts nearly any image file — even the Mac-specific DMG.
ISOBuddy is as simple to use as it is wide-ranging in its compatibility. Point it at the file you're sure is a disc, but your system isn't sure how to handle, and tell it where you want the output file to go, or hit Burn to load it onto a disc. It covers all the super-specific formats put out by specialty burning software, and as stated above, can convert and burn Mac DMG files. Once you've got an ISO out of ISOBuddy, you can usually burn it from any burning program you prefer, or use a compress/decompress tool like 7-Zip to view and extract its contents.
ISOBuddy is a free download for Windows systems only. If you know of an even more robust conversion tool, or a complementary bit of software, do share in the comments.