SOURCE:

tthsum-<version>.tar.gz should compile fine on both windows and linux. I will
gladly accept patches that fix so it compiles on your unix flavor. (The
project is too small to deserve autoconf'ing though, IMHO.)

tthsum is also featured on freshmeat.net:
http://freshmeat.net/projects/tthsum/

DEBIAN/LINUX:

tthsum_<version>_i386.deb is the debian binary package.
tthsum_<version>.tar.gz is the debian source package (should be the same as
the normal source package).

You can get the source and the debian package from mentors.debian.org too.

Add the following line to /etc/apt/sources.list:
    deb-src http://mentors.debian.net/debian unstable main contrib non-free

REDHAT/LINUX:

tthsum-<version>.<arch>.rpm are the RPM packages (thanks Jan "Yenya" Kasprzak).

WINDOWS:

tthsum-<version>.win32-bin.tar.gz is the windows binary.