From Alex Feinman:
ISO Recorder is a tool (power toy) that allows (depending on the Windows version) to burn CD and DVD images (DVD support is only available on Windows Vista), copy disks, make images of the existing data CDs and DVDs and create ISO images from a content of a disk folder. ISO Recorder has been conceived during Windows XP beta program, when Microsoft for the first time started distributing new OS builds as ISO images. Even though the new OS had CD-burning support (by Roxio), it did not have an ability to record an image. ISO Recorder has filled this need and has been one of the poular Windows downloads ever since.