| 2d3D, Inc. | | Device driver and embedded development. |
| BSQUARE | | Tools to build device drivers for Microsoft Windows operating systems. |
| Device Driver Development Resources | | A list of selected sites, news groups and tools to help locate additional device driver resources and development tools. List also includes hardware and software resources for the target side development and for embedded systems. |
| Divas Software | | File System Driver Development for Windows based systems using IFS and Device driver development using VxWorks, Linux, WinCE. |
| DriverStudio | | An integrated set of software tools for developing, debugging, tuning, testing and deploying Windows device drivers bt Compuware. |
| Harte Technologies | | Specializes in developing kernel-mode drivers for Windows NT, 2000, XP, including WDM, USB, and NDIS drivers. |
| Intelligraphics | | Device driver development including display, audio, communications, digital imaging, telecom, and embedded systems software. |
| Ionific Driver Development | | Professional device driver development for Windows, including audio, network, graphics, custom I/O and USB drivers. |
| Jungo | | Provides WinDriver and KernelDriver, device driver development tools, for Windows,Linux,Solaris. |
| Kernel Drivers | | Offers design, implementation and testing custom Windows filesystem and device drivers. |
| Matrikon OPC | | Real-time process drivers for plant systems, including OPC clients and servers, as well as driver utilities, development tools, educational resources, and training and support services. |
| MemAccess Library | | Gives programmers control of hardware devices from Win32 application without using the Windows Drivers Development Kit (DDK). It allows real-time direct access to memory mapped I/O. By Zeal SoftStudio. [Shareware] |
| Modular Systems | | Development of device drivers for Windows, system software and .NET applications. |
| NT Kernel Resources | | Windows Packet Filter Kit for developing filtering/modifying communication applications. Also Windows 2000 undocumented kernel structures. Open source TDI firewall. |
| NTPort Library | | Enables real-time direct access to PC I/O ports. By Zeal SoftStudio. [Shareware] | |
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