Our other project has to offer you Tutorials/Reviews/Themes/Conky and much more for Ubuntu & derivatives.
Check out site for more options and information.
OSBoxes offers you ready-to-use Linux/Unix guest operating systems.
If you don’t want to install secondary OS alongside with your main OS but still want to use/try it, then you can use VirtualBox or VMware on your host operating system to run virtual machine.
Support This Project
Simply download any image you want and run it as VM.
VirtualBox
VirtualBox is a x86 and AMD64/Intel64 virtualization product, it is the only professional solution that is freely available as Open Source Software under GNU GPL V2 license.
VMware
VMware Player is a virtualization product supplied free of charge for personal use by VMware, Inc. VMware Player can run existing virtual appliances and create its own virtual machines.
