Besides a couple of tools for device driver programmers:
They make a library that looks like a real bomb (if only anyone could find a willing device driver programmer... ):
I will only hint that the "hello world" or example on this page is:
Welcome to the BazisLib homepage. BazisLib is a library that simplifies development of drivers and applications for Windows x86/x64 and Windows Mobile. It consists of an object-oriented framework for creating Windows drivers (including a patched version of STLPort), a set of common interfaces for kernel- and user-mode services, and a set of classes for simplifying several user-mode Windows tasks, such as dealing with files or managing Windows Services. Many open-source projects provided by SysProgs, such as WinCDEmu, are based on BazisLib.
Here is a simple example of a PnP ramdisk driver for Windows written with BazisLib. A task that usually takes kilobytes of code, is solved in a simple and lightweight way, leaving all the routine work to the BazisLib framework:
They also have a couple tools very useful to the "normal user":
If you have a few spare bucks, it would be nice to help the guys over there getting a signed certificate:
Welcome to the WinCDEmu homepage. WinCDEmu is an open-source software that allows mounting CD/DVD images by clicking at the image files in Windows Explorer. It supports all Windows versions from WinXP to Windows 7, is open-source and completely free.
(Though maybe we should first getting "our" IMDISK signed)
A Service manager:
Windows Service Manager (SrvMan)
Windows Service Manager is a small tool that simplifies all common tasks related to Windows services. It can create services (both Win32 and Legacy Driver) without restarting Windows, delete existing services and change service configuration. It has both GUI and Command-line modes. It can also be used to run arbitrary Win32 applications as services (when such service is stopped, main application window is closed automatically).