Ubuntu 8.04 Hardy Heron…. free
As is customary
for Linux distributions, Ubuntu 8.04 includes incremental updates to
many of the software packages that make up the system, from low-level
details like the window manager and graphics subsystem, all the way up
to the bundled OpenOffice.org productivity suite.

The new release is also the first to ship with the Firefox 3.0
browser, which is currently still in late-stage beta testing. This is
widely touted as the savior of Linux, as it will bring Linux to the
masses. I tried some of the earlier versions a few years ago, when I
was building a tv tuner system, but opted for a Windows based machine.
Nonetheless, if you aren’t a Linux fanboy, you might want to give this
distribution a shot. It is free to download, or you can request a copy
be mailed to your physical address.
Download