STunnel - Stunnel is a proxy designed to add TLS encryption functionality to existing clients and servers without any changes in the programs' code.
CroxyProxy - CroxyProxy is the most advanced free and secure web proxy.
Shadowsocks - A fast tunnel proxy that helps you bypass firewalls
Haproxy - Reliable, High Performance TCP/HTTP Load Balancer
V2Ray - A platform for building proxies to bypass network restrictions.
goproxy - Proxy is a high performance HTTP(S), websocket,TCP, UDP, Secure DNS, Socks5 proxy server, TLS.