It's a Dapper SimplyMepis 6.0-Alpha 1
In 2003, Warren Woodford founded MEPIS LLC to realize his personal vision for a version of Linux that was easy to install and use. Later, he would release Simply Mepis a distro that I downloaded early on and began to tout at this site.
The distro featured simplicity in that the Live CD that could be run on your home or laptop computer without installation. This gave users a chance to try the distro before install.
Like many distributions, Simply Mepis was written on the Debian base. In fact, until recently Simply Mepis was still being written on the Debian base, however when release 3.4-3 was delayed by the constant updates of Debian Etch it became apparent that there might be changes ahead.
Warren, who has always produced a cutting edge, high quality distro began looking at what the alternatives were. His decision was to contact Mark Shuttleworth and the Canonical team who had developed UBUNTU. Using the UBUNTU base would give Simply Mepis the opportunity to provide a stable distro, updated every six months. In addition, it would not be that far from the Debian base, in fact, several Debian repositories could be used for adding and updating programs .
The buzz in the Linux community was quite positive and on April 10, 2006, SimplyMepis 6.0 Alpha 1 was born.