Portable tools for Procuctivity and System Recovery

I have a few custom bootable USB recovery sticks containing Hiren's Boot CD, UBCD4Win and ERD that have recovery consoles along with a WinPE (Mini XP) environment that I use to recover and repair all sorts of Windows issues.
On my USB drive I have loaded hundreds of applications; some for use in the WinPE/Recovery mode (AV/Antispyware system and Troubleshooting apps) and many, many more for use in 'tweaking/setting up' a proper secure system.
I also use both of these two tools listed below; sometimes in the PE environment and also in Windows.

Even if you don't have (need or want) a bootable USB recovery stick, these two utilities - Liberkey and NirLauncher - are fantastic tools to have on a USB drive.

Both give you tons of 'portable applications' you can bring with you to any Windows machine. Just plug in your USB drive and you can access loads of portable applications.
Liberkey:
http://www.liberkey.com/en/les-atouts-majeurs-de-la-liberkey.html
Download:
http://www.liberkey.com/en/download/6-liberkey-ultimate/
Nirsoft Download and integration information:
http://blog.nirsoft.net/2009/10/04/beta-version-of-nirlauncher-package-is-available-to-download/

Hiren's:
http://www.hirensbootcd.net/
To creat a bootable USB drive with Hirens:
http://www.hirensbootcd.net/usb-booting.html
UBCD4Win:
http://www.ubcd4win.com/
UBCD4Win to USB:
http://techacs.blogspot.com/2008/10/putting-ultimate-boot-cd-for-windows-on.html
http://www.youtube.com/watch?v=jdIKHdcMA0Y

http://ubcd4win.com/forum/index.php?s=11a797e9a1ce62fe41be3e3f6b14237a&showtopic=10411

Please note if you are going to create and use Hiren's or UBCD4Win and create a bootable USB drive you must read and follow the directions from Hiren's and/or UBCD4 Win's sites.
The have listed the how to's now in great detail. And there is plenty more info available by just checking their forums and of couse Google.
If you don't understand all of what is required or just 'can't do it' - do not even attempt it.
You may end up doing something real silly like formating your hard drive or worse some one else's!!
Also beware if you are not sure what you are doing or are not COMPLETELY versed in all of the the recovery and system tweaking applications listed you may also kill your macine or someone else's.
If you do hose something DO NOT CRY TO ME!
YOU ARE WARNED!