Grml!

Hiren's BootCD (HBCD) is a completely free bootable CD that contains a load of useful tools you can make use of in a variety of situations like analyzing, recovering and fixing your computer even if the primary operating system can not be booted.

SystemRescueCd is a Linux system rescue disk available as a bootable CD-ROM or USB stick for administrating or repairing your system and data after a crash. It aims to provide an easy way to carry out admin tasks on your computer, such as creating and editing the hard disk partitions. It comes with a lot of linux software such as system tools (parted, partimage, fstools, ...) and basic tools (editors, midnight commander, network tools). It requires no installation. It can be used on linux servers, linux desktops or windows boxes. The kernel supports the important file systems (ext2/ext3/ext4, reiserfs, reiser4, btrfs, xfs, jfs, vfat, ntfs, iso9660), as well as network filesystems (samba and nfs). »

Knoppix is an operating system based on Debian designed to be run directly from a CD / DVD (Live CD) or a USB key (Live USB), one of the first of its kind for any operating system. When starting a program, it is loaded from the removable medium and decompressed into a RAM drive. The decompression is transparent and on-the-fly.Although Knoppix is primarily designed to be used as a Live CD, it can also be installed on a hard disk like a typical operating system. Computers that support booting from USB devices can load Knoppix from a live USB flash drive or memory card.There are two main editions of Knoppix: the traditional Compact Disc (700 megabytes) edition and the DVD (4.7 gigabytes) "Maxi" edition. Each of these main editions has two language-specific editions: English and German.Knoppix mostly consists of free and open source software, but also includes proprietary software »

F4UBCD, FalconFour's Ultimate Boot CD, will be the last Boot CD you'll ever need.

Windows stores its user information, including crypted versions of the passwords, in a file called 'sam', usually found in \windows\system32\config. This file is a part of the registry, in a binary format previously undocumented, and not easily accessible. But thanks to a German(?) named B.D, I've now made a program that understands the registry.This site provides CD and floppy images for end users to easily edit their forgotten passwords. But it also provides full source code and binary builds of the tools to allow others to use as they like for other purposes. Registry format documentation also available. »

ALT Linux is a set of RPM-based operating systems built on top of the Linux kernel and Sisyphus packages repository

Finnix is a small, self-contained, bootable Linux CD distribution for system administrators, based on Debian GNU/Linux. You can use it to mount and manipulate hard drives and partitions, monitor networks, rebuild boot records, install other operating systems, and much more.

Hoek’s Tools is a vast collection of portable utilities for the management, diagnosis and repairing of computer problems, recover lost or deleted files or cracking passwords. There are literally hundreds of utilities. Hoek’s Tools can be used as a collection of portable repairing and diagnostic utilities which can be run from within Windows without installation. To do this insert prepared CD or USB drive and select a utility from the HT program launcher menu. To open launcher menu you need run \htools.exe »

DLC Boot 2016 is a rescue disk that is used as a Recovery CD. The point is that if you are having problems such as Windows can not boot, missing MBR, want to format the hard drive, remove viruses and so on, you can simply use the DLC Boot 2016 to resolve the issue. DLC Boot 2016 is also able to backup / restore windows partition, create partition windows, entering a locked Windows passwords, and much more!

The BootMed Live CD is an Ubuntu Remix for those new to Linux. It's main goal is to help the average Windows user to recover a computer that will not boot. BootMed can help you remove viruses from a computer that will not boot, recover deleted files and partitions. It will also guide you through imaging a damaged drive and also shows you how to create a virtual computer out of a physical computer. All of the BootMed tutorials are written in plain language that the average computer user can understand. »