Main features:

• supports NTLM authentication via parent proxy server (Error 407 Proxy Authentication Required);
• supports NTLM authentication at web servers (Error 401 Access Denied/Unauthorized);
• supports translation of NTLM scheme to standard "Basic" authentication scheme;
• supports the HTTPS 'CONNECT' method for transparent tunnelling through parent proxy server;
• has ability to change arbitrary values in client's request headers;
• supports unlimited number of client connections;
• supports connections from external hosts;
• supports HTTP 1.1 persistent connections;
• stores user's credentials in config file or requests password from a console during the start time;
• supports intelligent failure detection and failover between multiple upstream proxies;

Download: NTLM Authorization Proxy Server 0.99