Links
NTLM Authorization Proxy Server (APS) is a proxy software that allows you to authenticate via an MS Proxy Server using the proprietary NTLM protocol. It may be used with Socks via HTTP if you sit behind HTTP only MS Proxy. It is written in Python v1.5.2 language.
The official Socks site from NEC
http://www.socks.nec.com
The Socks4 Protocol RFC from NEC
http://www.socks.nec.com/protocol/socks4.protocol
The Java official site
http://www.java.sun.com
The Apache official site
http://www.apache.org