Apps similar to BFilter include Privoxy, which is free and open source. Other options are Proxomitron, Proximodo, CacheGuard Gateway and Privaxy. In total there are six Ad Blockers like BFilter for Windows, Mac, Linux and self-hosting.
Privoxy is a non-caching web proxy with advanced filtering capabilities for enhancing privacy, modifying web page data and HTTP headers, controlling access, and removing ads and other obnoxious Internet junk.
For those who have not yet been introduced, meet the Proxomitron: a free, highly flexible, user-configurable, small but very powerful, local HTTP web-filtering proxy.
United States
Proximodo is a loopback proxy server, seemingly a fork of proxomitron though likely abandonware. Unlike Proxomitron its developer is not existentially challenged. Additionally Proximodo can use Proxomitron filters. Unfortunately it does not support SSL connections.
CacheGuard Gateway is a free, open-source network security appliance for startups, growing businesses, and SMEs/SMBs that need enterprise-grade protection without the complexity or cost.
France
EU
Privaxy is the next generation tracker and advertisement blocker. It blocks ads and trackers by MITMing HTTP(s) traffic.
WebCensor is profanity filter for Google Chrome and Mozilla Firefox browsers. In addition, you can use it as content filter, as it uses not only the predefined list of bad, curse, cuss, offensive, swear words but also the ability to add your own custom filters which people will.
