NethServer might be a bit more popular than SquidMan. We know about 1 link to it since March 2021 and only 1 link to SquidMan. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Next, you'll need software to handle the proxying. The only thing I found for Mac is called SquidMan. It's not designed for evading censorship, its true purpose is reducing web traffic, but in order to do that it functions as a proxy server. Source: over 1 year ago
Check out Nethserver - https://nethserver.org/. Source: over 2 years ago
Polipo - A small and fast caching web proxy (a web cache, an HTTP proxy, a proxy server).
Zentyal - Linux directory, domain, mail, gateway and infrastructure server for SMBs.
Artica Proxy - Artica Proxy is an appliance that claim to manage Squid-cache proxy with all features that Squid...
ClearOS - A very good alternative for Windows Server, for free
Privoxy - Privoxy helps users to protect their privacy.
pfSense - pfSense is a free and open source firewall and router that also features unified threat management, load balancing, multi WAN, and more