NetbootCD

NetbootCD is a GNU/Linux live CD based on Tiny Core Linux. The live CD allows the user to download and run one of several Linux netboot installers, which can install a full GNU/Linux system with only a hard drive and Internet connection.

Several of the distributions supported by NetbootCD are prerelease distributions (such as Debian testing) or development distributions (openSUSE Factory, Fedora Rawhide, Debian sid.) Because NetbootCD downloads the latest installer, which in turn downloads the latest system components, you can install a fully up-to-date system without burning a new CD.
Supported Distributions

The following distributions are installable from the current NetbootCD:

NetbootCD also supports downloading and launching the latest versions of the GRUB4DOS bootloader and of Tiny Core Linux's Core.

Downloads

The current version of NetbootCD is version 5.1 (Jan. 10), available from TuxFamily. It is built on a Core-4.7.3 base (the TinyCore kernel is now built with kexec support). The ISO image can be burned to a CD/DVD or written to a flash drive.
Download NetbootCD 5.1 (12 MiB) (md5)
NetbootCD is also available on a set of 1440KB floppies. (See here for how it works.)
Download floppy version: (old v4.6 - 5 disk set) or (5.1 - 6 disk set)

I have also made available an ISO image with NetbootCD 5.0 and CorePlus 4.7.3. It should work with CDs or USB drives, and includes everything in CorePlus. The image boots to the X desktop and then lets you run NetbootCD (by typing "netboot") after exiting to the prompt.
NetbootCD-5.1+CorePlus-4.7.3.iso (74 MiB) (md5)

Both ISO images include the GRUB4DOS bootloader in command-line mode.

Notes (for 5.1)
Links
Licensing and Source

The NetbootCD script (nbscript.sh) is written by me and is licensed GPLv2+: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

Text of GPLv2 - Text of GPLv3

Source for software in version 5.1 can be found at http://distro.ibiblio.org/tinycorelinux/4.x/x86/release/src/ and http://downloads.tuxfamily.org/netbootcd/5.1. The build script and related components are in build.tar.gz, and the source code to components not in Tiny Core is in source.tar. (To build NetbootCD, grab build.tar.gz. You'll also want to put CorePlus-4.7.3.iso in that folder.)