BgInfo This fully-configurable program automatically generates desktop backgrounds that include important information about the system including IP addresses, computer name, network adapters, and more.
BlueScreen This screen saver not only accurately simulates Blue Screens, but simulated reboots as well (complete with CHKDSK), and works on Windows Vista, Server 2008 and higher.
Ctrl2cap This is a kernel-mode driver that demonstrates keyboard input filtering just above the keyboard class driver in order to turn caps-locks into control keys. Filtering at this level allows conversion and hiding of keys before NT even "sees" them. Ctrl2cap also shows how to use NtDisplayString() to print messages to the initialization blue-screen.
DebugView Another first from Sysinternals: This program intercepts calls made to DbgPrint by device drivers and OutputDebugString made by Win32 programs. It allows for viewing and recording of debug session output on your local machine or across the Internet without an active debugger.
Desktops This new utility enables you to create up to four virtual desktops and to use a tray interface or hotkeys to preview what’s on each desktop and easily switch between them.
Hex2dec Convert hex numbers to decimal and vice versa.
NotMyFault Notmyfault is a tool that you can use to crash, hang, and cause kernel memory leaks on your Windows system.