Trinity Rescue Kit is described as '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' and is an app in the security & privacy category. There are more than 25 alternatives to Trinity Rescue Kit for a variety of platforms, including Windows, Linux, Mac, Self-Hosted and Linux Mint apps. The best Trinity Rescue Kit 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 MediCat USB. Other great apps like Trinity Rescue Kit are SystemRescue, John the Ripper, Ultimate Boot CD and All in One – System Rescue Toolkit.
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.