The document describes HDF-EOS tools developed to help users work with Earth Observing System (EOS) data stored in HDF-EOS format. It outlines libraries and tools created, including the HDF-EOS to GeoTIFF Converter (HEG) tool, which can convert HDF-EOS files to GeoTIFF and perform subsetting, stitching, and reprojection. It also describes the HDF-EOS plugin for HDFView, which allows browsing of HDF-EOS data and objects. The tools were created to make HDF-EOS data more accessible to users and reduce the need to learn HDF/HDF-EOS libraries.