http://bugs.winehq.org/show_bug.cgi?id=5048
--- Comment #18 from Dan Kegel dank@kegel.com 2012-06-18 11:37:22 CDT --- A few possible apps (some with source):
http://www.codeproject.com/Articles/10330/A-simple-IOCP-Server-Client-Class
http://www.autohotkey.net/~TheGood/AHKsock/AHKsock%20Example%202%20-%20File%...
The win32 version of Apache httpd uses it if you turn on EnableSendfile
pywin32 supports it, and has a test case; it was added by http://sourceforge.net/tracker/index.php?func=detail&aid=1962146&gro...
http://code.google.com/p/cogen/ uses that, and might also have a test suite
Silkroad online may use it, see bug 21535
http://www.codeproject.com/Articles/2374/A-reusable-high-performance-socket-...