CPUID
CPUID shows various properties of your CPU.
CrashProcess
Pass CrashProcess a PID and it will crash the process if you have sufficient permissions. It can be useful for testing stuff.
ExploreLibs
ExploreLibs is a tool for viewing the contents of LIB files.
FindIDT
FindIDT searches for and prints the IDTs in a physical memory dump.
KernView
A kernel module for looking at various x86 protected mode registers and memory structures. I've released it as open source under a GPL license.
ListObj
ListObj prints the entire Windows object space.
SIMQuery
A tool that retrieves the ICCID and IMSI from a GSM SIM card.
WKML
WKML (Windows Kernel Module Loader) is a tool for loading and unloading kernel modules in Windows. It can also display a list of the currently loaded modules.