As Linux popularity is growing everyone want to hand on Linux. As you know Linux is always free and there are many Linux Distributions and almost every distro is free. You can download Linux from different Linux developer site.
Linux comes with hundreds of free software included in distribution and downloading full distribution is very big in size and with normal internet connection it is difficult to download Linux. Another way to get Linux is on CD/DVD for free but from where you can get free Linux CD/DVD or can buy at low price.