We have a new graphics programming utility available. AMD Compress is a command line tool that uses the AMD Compress library and image IO plug-ins for compressing textures and creating mip-map levels.
From that web page: "It supports a wide range of compression formats including the latest BCn formats. Images can be loaded and saved for a variety of file format such as DDS, PNG, BMP and EXR."
This tool replaces the old "Compressonator" and ATI Compress.