SoundFX 2000 2.04  THE sound card emulator for DOS programs running under Windows XP, 2000 or NT4.  SoundFX provides a complete emulation of a SoundBlaster 16 card.  Requires Windows XP, 2000 or NT 4 (service pack 3 or later), a Windows supported sound card and a Pentium 90 or better.

Release notes

MTClib 1.0.1  .A multithreading library for C and C++ programs that is open source, cross platform and high performance.

User documentation

SwsVpkt 1.0.0.5  Virtual Packet Driver provides an implementation of the packet driver specification enabling DOS networking applications to run on Windows XP, 2000 and NT4.

Release notes
Example of raw Ethernet frame I/O from Win32 user mode

SwsSock SDK 1.0.0.4  .The SwsSock library provides a cross platform,  BSD compatible, sockets API, a TCP/IP protocol stack and drivers for common Ethernet and serial adapters.

Release notes
Prebuilt examples

NetCenturiion 1.2.0.4  A TCP/IP packet filter for Windows 2000 and XP that protects your computer from unauthorised access and attacks while connected to the public Internet.

NetCenturion is open source

MailCenturion 1.0.0.6  MailCenturion is a POP3 e-mail filter that can automatically remove spam and viruses.  MailCenturion learns from your choices and automatically accepts or rejects similar messages in the future.

Release notes

Masm2djg  Convert Microsoft format COFF files to DJGPP format and back.  Enables 32-bit DOS applications built with DJGPP to link with object files and libraries compiled with MASM 6 and Microsoft Visual C++.

Masm2djg is freeware.  The archive contains full source, makefiles, application note and a prebuilt executable for DOS or Windows..

Application note