free Nirsoft Mail PassView – to see forgotten Outlook passwords ().

or maybe at least just Windows 2012r2 Step Recorder.

faststone capture (much better than Snipping Tool).

free Notepad Pro to compare for example cisco config changes.

Instead of having pile of installation DVD disks or USB disks, just iso files and 3-4 usb dongles for all Windows versions, esxi, acronis, hiren tools, memtest, diagnostics tools and so on.

free “Windows 7 usb tool” unetbootin yumi.

R-studio (to restore data even from damaged RAID disks).

Separate tiny Memtest (i prefer as a pxelinux option in WDS).

Hiren tools (mhdd, victoria, memtest to diag freshly purchased HDDs, RAM).

Acronis tools (usually on USB, or as WDS image) mainly for cloning, partitioning, backups.

To prevent non-authorized access by ordinary users during booting, place pxelinux with password before WDS network bootloader.

Microsoft DaRT from MDOP, former ERD disk (very easy to add to WDS, or replacing boot.wim on USB with Win7 or win8) For repair, locksmith to reset built-in administrators password, to backup files from not booting disk and so on.

Csvfileview