This is a C++ implementation of a socks4 server. It supports both CONNECT and BIND operations. Version 0.8 does not support any sort of validation / access control of who can use the server.
Source code & Documentation
The source code is released under the GNU General Public License. Read more here.
socks4-0.9.1.tar.gz 2006-10-03 Update to sockets library v2.1