Linux Lite 3.4
Here we have a fast and lightweight desktop distro based on Ubuntu but with XFCE instead of Unity. That is not the only difference: there are numerous other enhancements and changes. Linux Lite is suitable for new users but also good for more experienced members of the Linux community. For a distro that focuses on performance of the desktop, it is also rather good looking. The choice of the XFCE desktop enables them to create a good compromise between speed and functionality, giving all the features that most people use yet retaining a responsive and fast desktop.
Being based on Ubuntu gives a couple of advantages to Linux Lite, and other such distros. The core distro has a solid, well tested base and there is also the wide range of software packages available from the Ubuntu repositories, as well as the many PPAs you can add if feeling a little more adventurous. Login details: username linux, and the password is blank.