readelf and objdump are both excellent utilities if you are on a Unix box.
Both are provided by Cygwin.
readelf will give you a good overview of the ELF header information, section headers. You can also use it to get relocation and symbol information. Overall, readelf can give greater detail on the contents of an ELF file.
objdump has some similar features to readelf, but also includes the ability to disassemble sections.