HDF-EOS Applications That Read HDF5

HE5MU
HE5MU is a tool for data producers or users to update metadata inside an HDF-EOS5 file. It is a command-line utility that can be used to extract, replace and update metadata.

GSFC Open Source Software page
Tools such as XML to HDF-EOS convert, HDF-EOS plug-in, and many others can be found from this page.