Opensource windows web filter?

Question

Windows

Good!
Are there opensource web-filter solutions for windows?
That is, a program that can filter web traffic on the PC itself and block it, for example - k9 web protection.
That is, not a firewall, but an http filter, you can do it without a GUI. As an option in its infancy, on github, transparent-proxy, etc.,
thank you!

Answer 1

Squid 3.5 and separate GUI