Grml is described as 'Bootable live system (Live-CD) based on Debian especially well suited for administrative tasks like installation, deployment and system rescue' and is an app in the network & admin category. There are more than 10 alternatives to Grml for a variety of platforms, including Linux, Windows, Mac, Android and Self-Hosted apps. The best Grml alternative is Hiren’s BootCD. It's not free, so if you're looking for a free alternative, you could try Hiren’s BootCD or Hiren’s BootCD PE. Other great apps like Grml are Ultimate Boot CD, Ikki Boot, ALT Linux and Knoppix.
Boots PCs with startup issues, recovers data from non-bootable drives, fixes over 100 Windows boot problems, resets lost passwords, backs up and clones partitions, restores files from crashed systems or formatted drives, and secures sensitive data.
Trinity Rescue Kit or TRK is a free live Linux distribution that aims specifically at recovery and repair operations on Windows machines, but is equally usable for Linux recovery issues. Since version 3.
ROSA Linux is a Linux operating system and distribution, developed by Russian company LLC NTC IT ROSA. It is available in three different editions: ROSA Desktop Fresh (GNOME and KDE), ROSA Enterprise Desktop, and ROSA Enterprise Linux Server.
AppleJack is a user friendly troubleshooting assistant for Mac OS X. With AppleJack you can troubleshoot a computer even if you can't load the GUI, or don't have a startup CD handy. AppleJack runs in Single User Mode and is menu-based for ease of use.
Recovery Is Possible (RIP) is a Slackware-based CD or floppy boot/rescue/backup/maintenance system. It has support for a lot of filesystem types and contains a bunch of utilities for system recovery.
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