There are 2 repositories under vpn-anonymizer topic.
A simple vpn written in C
IP2Proxy Laravel extension enables the user to query an IP address if it was being used as open proxy, web proxy, VPN anonymizer and TOR exits.
IP2Proxy .NET component allows users to query an IP address to determine if it was being used as open proxy, web proxy, VPN anonymizer and TOR exits.
IP2Proxy CakePHP plugin enables the user to query an IP address if it was being used as open proxy, web proxy, VPN anonymizer and TOR exits.
IP2Proxy Erlang module allows users to query an IP address to determine if it was being used as open proxy, web proxy, VPN anonymizer and TOR exits.
IP2Proxy D library allows users to query an IP address to determine if it was being used as open proxy, web proxy, VPN anonymizer and TOR exits.