https://github.com/eycorsican/go-tun2socks — Go implementation
https://github.com/Jigsaw-Code/outline-go-tun2socks (the code has been modified to be used in Outline/Intra project, but still useful)
https://github.com/ambrop72/badvpn/tree/master/tun2socks — works on Linux and Windows. Old and well supported project.
https://github.com/zhuhaow/tun2socks — for macOS/iOS
https://github.com/zhuhaow/NEKit — for iOS
https://github.com/yinghuocho/gotun2socks ­— Windows, macOS and Linux support
https://github.com/xjdrew/kone — Linux and macOS

eycorsican/go-tun2socks больше не обновляется, через пару часов работы зависает. Заменил на GitHub - xjasonlyu/tun2socks: tun2socks - powered by gVisor TCP/IP stack.
И еще один в список GitHub - heiher/hev-socks5-tunnel: High performance tun2socks for Linux/Android/FreeBSD/macOS/iOS (IPv4/IPv6/TCP/UDP)