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.
BlockParty - Real-time voice chat rooms from the creators of turntable.fm
Secateur - Use Secateur if you want to temporarily or permanently block or mute (or both block and mute) a Twitter account and all its followers.
NextDNS - Block ads, trackers and malicious websites on all your devices.
Boyfairy - Your opportunity to educate right before you block someone.
Likers Blocker - Likers Blocker is a browser extension that lets you block all the followers and the people who like a specific tweet on Twitter.