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Firezone - Firezone is a remote access platform that’s painless to deploy, easy to manage, and built on WireGuard® to be blazing fast. Best of all it's self-hosted and open-source.
Squid Proxy - Website Content Acceleration and Distribution. Thousands of web-sites around the Internet use Squid to drastically increase their content delivery. Squid can reduce your server load and improve delivery speeds to clients.
Tunnelblick - free software for OpenVPN on OS X and macOS
CCProxy - Want to share Internet connection? Get every computer online through a single Internet connection?
Viscosity - Viscosity is a VPN client for Mac OS X and Windows.
Apache Traffic Server - Fast, scalable and extensible HTTP/S 2 and 1.1 compliant caching proxy server.