All current binaries are built with VC++ 6.0 SP1(Version 12.00.8804 for 80x86) or VC++ 8.0 SP1(14.00.50727.762 for x64). These binaries are compiled from the standard Ruby source code (or Subversion repository). Extension libraries are made from the sources gotten from linked sites.
All binaries are archived by 'zip'.
If you want to check md5sum, see below example.
ruby -r digest/md5 -e "puts Digest::MD5.hexdigest(File.open('filename', 'rb'){|f|f.read})"
Rafael
Eu quero aprender Ruby