Refined Twitter - A browser extension that improves the Twitter experience
Nofanity - Nofanity removes swear words from YouTube videos
Tweetbot - Sync your timeline across your iPhone, iPad, and Mac. Mute tweets by user, hashtag, tweet source, or keywords (including regex). 3rd Party support for image, video, read later, and timeline sync services.
Tune by Google - AI-powered Chrome extension that hides toxic comments
ilo - Premium Twitter analytics
SideComments.js - add Medium like comments to your site