Though it can do other stuff, I use this to edit ISO images meant to be burned to a CD or DVD, to make them appropriate for copying to, and booting from, a USB stick.
Phenomenal. I wish I knew about this a long time ago. I've ignored many Linux distributions because of the very issue this tool solves.
Linux distributions + Debian >
Automagically repairs a boot loader.
This is something I wish I had/knew about a long time ago. I've had bootloader misadventures that really stressed me out.
I'll accept this, even though it uses systemd.
A defragmentation tool for individual files.
Note that defragmentation is irrelevant with an SSD, and even with a HDD, Windows will auto-defragment if you leave it alone for a bit. For windows 8 and Windows 10, my administrative settings are so aggressive that when I'm inactive for five minutes it pokes around to see what it can defragment.
A general system information utility.
A GPU (graphics card) information utility.
Included in FurMark.
A process viewer.
It's 80k, so why not include it in my kit.
Windows NT needs
psapi.dll downloaded and put in
Confuses a hidden Keylogger (if any) by generating a ton of fake key strokes internally.
http://mion.faireal.net/BES/ (source code)
Throttles CPU usage. Good for grinding applications to a halt, for testing, or to make sure that CPU-hogging applications don't shit all over your computer.