FastRawViewer opens RAW files extremely quickly and renders them on-the-fly, instead of just displaying embedded JPEGs. It allows a photographer to see the RAW exactly as a converter will "see" it, without any delays or waiting time, guaranteeing the possibility to sort and cull RAW images lightning fast and based on the quality of the RAW itself, not JPEG previews.

RawDigger is a tool to visualize and examine pure raw data as the camera has recorded it. In essence, it is a microscope of sorts that lets you drill down into raw data. RawDigger doesn't alter the raw data in any way. RawDigger is not a raw convertor. Instead, it allows you to see the data that will be used by raw convertors.