Fedora "It aims to be a complete, general-purpose operating system that contains only free and open source software."
There are too many to list, as the it would take many pages to just list the titles the most common distributions are: Centos Redhat Enterprise Debian Ubuntu Slackware Gentoo
"Types" of Linux are Called Linux Distributions. Linux by itself is only a kernel, you need more than that for a full system, to get this, distro's were develpoed to include all of this to make a Linux system easier to install. Popular Distro's Are Ubuntu, Debian, Fedora, RHEL, Linux Mint, Arch Linux, OpenSUSE, etc, you can find more at distrowatch
If I had to type all the Linux distros that exist, I'd be here for a long time. Common ones are: Ubuntu (and derivatives such as Kubuntu, Xubuntu, Lubuntu, etc.) openSUSE Fedora Debian Mint
Linux is a modern operating system kernel used by GNU/Linux systems like Ubuntu, Linux Mint, Debian, OpenSuSe, Fedora and many other. Linux is mainly used for servers and embedded systems, but is gaining popularity in desktop system market.
Fedora and openSUSE are the open-community spin-offs of privately managed and developed for-profit GNU/Linux distributions, Red Hat Enterprise Linux and SUSE Enterprise Edition Linux.
Most desktop Linux distributions (Ubuntu, Fedora, PCLinuxOS, OpenSUSE) are equally suitable for laptops.
Ubuntu - GNOME Kubuntu - KDE Xubuntu - Xfce Puppy Linux - JWM Damn Small Linux - JWM, Fluxbox Fedora - GNOME (default) OpenSUSE - KDE (default) Debian - GNOME, KDE, Xfce Red Hat Enterprise Linux - GNOME Linux Mint - GNOME Xandros - KDE PCLinuxOS - KDE
GNU/Linux? Plenty. Debian, Ubuntu, Arch Linux, Gentoo, Slackware, Fedora, and many more. Non-GNU Linux? Android.
There's Ubuntu, Debian, Red Had, Fedora, Gentoo, Arch, Mint, SuSE, Slackware... A good way to find out is to look into Distro Watch. The web site more or less keeps a monitor on how popular a given Linux distribution is.
This is usually a matter of contention. The most popular choices are Ubuntu, Kubuntu, Linux Mint, OpenSUSE, and Fedora.
Yes. You can install Linux on Intel-based Macs using the same discs that you would use on a PC. You can either install through Boot Camp, or through booting from the CD. On older PowerPC Macs, it can sometimes be trickier. Ubuntu, the most popular distro, no longer supports PowerPC processors officially. However, Fedora, OpenSUSE, and Debian will still work. A custom Debian installation is probably the best idea for a G3 iMac; Fedora and OpenSUSE should be fine on a G4 or G5.