UserGuiding - Create in-app experiences with the most straightforward product adoption platform — quick implementation, lasting user engagement.
Nofanity - Nofanity removes swear words from YouTube videos
Usetiful - Fight user churn with great user onboarding. Interactive product tours and smart tips significantly improve your user retention.
Eccco - Record a listen short audios, like Twitter but with voice.
Userlane - Digital adoption platform with interactive guidance for software applications allowing anyone to understand and master any software from the get-go.
SideComments.js - add Medium like comments to your site