Nofanity - Nofanity removes swear words from YouTube videos
Highlight - "Highlight" physical books through conductive pages 📖✨
Tune by Google - AI-powered Chrome extension that hides toxic comments
Brevy (beta) - Give feedback, Google-doc style, directly on your website
SideComments.js - add Medium like comments to your site
Buglife - Seriously awesome bug reporting for iOS apps