Dr. Doug Jones has been so kind to provide the net with very excellent explanations of two algos. Well iD proves itself to be ahead of the game when it comes to providing resources to programmers and developers. You can now download the source code for Castle Wolfenstien 3d directly from iD here and from a mirror . WinSock Sample Source Free source code for an early WinSock implementation from Waterloo. WinVN is a Win16 and Win32 program for reading Newsgroups.
Source code is readily available.
FTP Client Animated GIF code Win32 C code for displaying Animated GIFs. The GNU Project is predominantly UNIX source code, yet a there is ported and portable source code here. Plus, it's all free. Here's another GNU page . I generally use a stateside mirror .