Blokada - The best ad blocker for Android. Free and open source.
Adblock Plus - AdBlock Plus is a browser extension for Firefox, Chrome, Opera, and several other popular browsers that prevents intrusive ads like pop-ups and malicious code from appearing on websites you visit.
AdBlock - Ad blocker for Chrome, Safari and Opera on desktop and Safari for iOS devices.
BlockParty - Real-time voice chat rooms from the creators of turntable.fm
AdGuard - Surf the Web Ad-Free and Safely. Shield up!
Twitter One Click Block - Add a block button for a simple one click blocking.