RED HAT, FEDORA, UBUNTU etc.
While I tried to give you a short description and a download link so that you can also use it on your PC.
Fedora is a Linux-based operating system that showcases the latest in free and open source software. It is Based on RED HAT Linux and release in every 6 to 9 month period, actually it is a RED HAT BETA release. You can run all command which included in RED HAT.
It is a free and Linux-based operating system for your PC, Laptop or Server. You can surf the web, manage your e-mails and photos, do office work, play videos or music.
DOWNLOAD OPEN SUSE
Mandriva is a developed linux, it include some free and trial software, one of them is WINE which can run windows applications on linux, or any exe file in linux.
Kubuntu is a free, user-friendly operating system based on the K Desktop Environment and on the award winning Ubuntu operating system. With a biannual release cycle and at least 18 months of free security updates for each release, it is the secure, stable computing environment
levels of on-site support and service.
It is one of my feverate Linux, because it include MPlayer to play media files of any formet and messenger, webcam, and many more great softwares. Many of Laptop companies include it in their machine ( Acer, Ban Q, Asus, Lenovo etc)
You can find many more free Linux Destro, but these are very common and you can enjoy it when you use them