Blokada - The best ad blocker for Android. Free and open source.
Polipo - A small and fast caching web proxy (a web cache, an HTTP proxy, a proxy server).
BLOCK THIS! - Block This 3.0 is a FREE and Open Source ad blocker for Android that works in all apps and browsers!
Privoxy - Privoxy helps users to protect their privacy.
AdShield.ai - AI-powered placement exclusion lists for Google Display campaigns
ExaProxy - ExaProxy is a a high-performance non-caching proxy.