gobetween is described as 'Modern & minimalistic proxy server for the Cloud era'. There are eight alternatives to gobetween for a variety of platforms, including Linux, Windows, Mac, Android and BSD. The best alternative is nginx, which is both free and Open Source. Other great apps like gobetween are Shadowsocks (Free, Open Source), Haproxy (Free, Open Source), stunnel (Free, Open Source) and V2Ray (Free, Open Source).
nginx [engine x] is a HTTP and reverse proxy server, as well as a mail proxy server written by Igor Sysoev. It has been running for more than five years on many heavily loaded Russian sites including Rambler (RamblerMedia.com).
A secure socks5 proxy, designed to protect your Internet traffic. - Super Fast Bleeding edge techniques using Asynchronous I/O and Event-driven programming. - Flexible Encryption Secured with industry level encryption algorithm. Flexible to support custom algorithms.
Proxy is a high performance HTTP(S), websocket, TCP, UDP, Secure DNS, Socks5 proxy server, TLS. Chain-style proxies, NAT forwarding in different LAN, TCP/UDP port forwarding, SSH forwarding ,ipv4 and ipv6 supporting.