The Scientific Linux Live CD/DVD is a bootable CD/DVD that runs Linux directly from CD/DVD without installing. It is based on Scientific Linux 5.4.it also available for the i386 and x86_64 architectures.

Features :

kernel 2.6.18-164.6.1.el5
gnome 2.16.0
kde 3.5.4
gimp 2.2.13
firefox 3.0.15

Software added compared to standard Scientific Linux

* ntfs-3g (read/write NTFS support)
* ntfsprogs
* …

Fedora 12 releases and available for download.it comes with Optimized performance now all the software packages on 32-bit (x86_32) architecture have been compiled for i686 systems, with special optimization for the Intel Atom processors used in many netbooks, but without losing compatibility with the overwhelming majority of CPUs,NetworkManager broadband …

openSUSE 11.2 release features new and massively improved versions of Firefox, OpenOffice.org, GNOME, KDE, and more.openSUSE 11.2 comes with the latest version 2.6.31 of the Linux kernel, the beating heart of every openSUSE system. The default file system of openSUSE was switched to the new Ext4.
HighLights:

Linux kernel 2.6.31.5
GNOME 2.28.0
KDE 4.3.1
EXT4 …

Mandriva Linux 2010 officaly released after two Alpha versions, one Beta and 2 RC.Mandriva 2010  downloaded for free either as a Live KDE and GNOME CDs .mandriva 2010 is  also both i586 and x86_64 architectures.
Highlights :

Linux kernel 2.6.31
kde 4.3.2
EXT4
GNOME 2.28.0
Amarok 2.2
Wine 1.1.32
Openoffice org 3.1.1
USB startup disk creater

Ten Mandriva Linux …

KDE 4.3.3 is the next-generation KDE desktop environment for Linux, Windows and Macintosh platforms. With every release, KDE 4 is here to deliver the most modern, beautiful and attractive desktop environment.the KDE 4.3.3 desktop environment ships with many packages, including web development applications, educational tools, administrative programs.
Features :

KWin, a …

openSUSE 11.2  first release candidate for openSUSE 11.2. This release includes quite a few bugfixes and several updates, including GNOME 2.28 final, Linux 2.6.31.3,  PulseAudio 0.9.19 , Qt 4.5.3 and others.

More info

Highlights :

Blender     2.49a
Evolution    2.28
GNOME    2.28
Gnumeric    1.9.13
KMyMoney    1.0.2
Konversation    1.2
Qt    4.5.3
SeaMonkey     2.0 RC1

click  here to download

Mandriva Linux 2010 RC2 as a Free edition for the x86-32 and x86-64 architectures and  RC2 release  have added Virtualbox image avaiable.RC2 version is all focused on bug fixing.kde 4.3.2: this is the latest stable version of KDE4 environment. Enjoy innovation and stability and GNOME 2.28  use your favorite environment …

SystemRescueCd is an operating system by definition, though the primary purpose of SystemRescueCD is to repair unbootable or otherwise damaged computer systems after a system crash. SystemRescueCD is not intended to be used as a permanent operating system. It runs from a Live CD or a USB flash drive.
System Rescue …

calculate linux desktop based on Gentoo Linux, and modern desktop-based graphical environments KDE and Calculate Linux Desktop XFCE (CLDX) with desktop XFCE, which can perform most office tasks. The main feature is a quick installation, easy system upgrades and the ability to store user accounts on the server.

Calculate Linux Desktop …

Based on Xubuntu 9.04 Jaunty Jackalope, Linux 2.6.28, XFCE 4.6 and Xorg 7.4, Linux Mint 7 “Gloria” XFCE CE features a lot of improvements and the latest software from the Open Source World.
click here for more info
for download click here