This is the Mac Linux USB Loader, a tool allowing you to take an ISO of a Linux distribution and make it boot using EFI. It requires a single USB drive formatted as FAT with at least 2 GB free recommended. The application is available in English and is partially translated into Spanish and Traditional Chinese.
The tool is necessary to make certain Linux distributions boot that do not have EFI booting support. Many distributions are adding this with the release of Windows 8, but it has not...