Top Alternatives to Knoppix

Linux Mint is a Linux based free operating system.

openSUSE formerly SUSE Linux and SuSE Linux Professional, is a Linux-based project and distribution sponsored by SUSE Linux GmbH and other companies.

elementary OS is a Linux distribution based on Ubuntu.

Xubuntu is an elegant and easy-to-use operating system.

Lubuntu is a fast and lightweight operating system. The core of the system is based on Linux and Ubuntu.

Kubuntu is an official flavour of the Ubuntu operating system which uses the KDE Plasma Desktop instead of the Unity graphical environment.

Chromium OS is the open-source development version of Chrome OS, one of Googles operating systems (OS). Chromium OS is based on the Linux kernel and uses Googles Chromium browser as its principal user interface. As a result, Chromium OS primarily supports web applications.

LinuxLive USB Creator is a free Microsoft Windows program that creates Live USB systems from installed images of supported Linux distributions.

Manjaro Linux or simply Manjaro, is a Linux distribution based on Arch Linux. Manjaro Linux is based on the rolling release update model similar to that of Arch Linux and uses Pacman as its package manager.

Tails is a live operating system that you can start on almost any computer from a DVD, USB stick, or SD card. It aims at preserving your privacy and anonymity.

Puppy Linux is an operating system and lightweight Linux distribution that focuses on ease of use and minimal memory footprint.

Raspbian is a Debian-based computer operating system for Raspberry Pi.

SliTaz GNU/Linux is a lightweight GNU/Linux distribution, community-based, suitable for use on older hardware and as a Live CD or Live USB.

Ultimate Boot CD is a bootable CD that contains tools for your computer's BIOS and CPU, Boot Management, Data Recovery, Device Info, etc.

BartPE (Barts Preinstalled Environment) was a lightweight variant of the 32-bit version of Microsoft Windows XP or Windows Server 2003, similar to Windows Preinstallation Environment, which could be run from a Live CD or Live USB drive.

MobaLiveCD is a freeware that will run your Linux LiveCD on Windows thanks to the excellent emulator called "Qemu".

chntpw is a software utility for resetting or blanking local passwords used by Windows NT, 2000, XP, Vista, 7, 8 and 8.1.