sni

GO Simple Tunnel - a simple tunnel written in golang

3proxy - tiny free proxy server

Just Ceal It (可用于无代理合法抵御网络监听和开展网络研究)

Rust port of @masterking32's MasterHttpRelayVPN — all credit to @masterking32 for the original idea and Python implementation. Free DPI bypass via a Google Apps Script relay with TLS SNI concealment. CLI + cross-platform desktop UI, HTTP + SOCKS5 proxy, no runtime deps.