The document discusses several new social media platforms and technologies: - Thumb allows users to crowdsource opinions on outfits by voting on photos. - Soundsharing enables sharing photos or messages through high-pitched sounds detectable by nearby phones. - Whisper promotes anonymous sharing of secrets, though it has caused some controversy. - Enterprise social networks allow internal company collaboration and knowledge sharing through social features. - AroundMe connects users to nearby activities and events to promote local businesses and cultural opportunities.