CONV. - Convert YouTube video to MP3, GIF or MP4
Friend Hunt - Get desktop notifications when your friends comment on PH
Downie - Video download for OS X. Downie supports at this moment over 1,000 different sites.
Preview Hunt - 🔎Preview and prepare your Product Hunt submission
Yout - YouTube to Mp3 Converter
Product Hunt Cards - Embed products and comments across the web 🌐