Lunchclub - Curated 1:1 professional connections
Snaptivity - Real-time photo sharing with the world nearby
Virus Cafe - Make a friend in 2 minutes
Flashgap - Time-delayed photo-sharing app of last night's embarrassment
Donut Slack Bot - Get matched with a new coffee buddy each week in Slack
WiFi Map - A crowdsourced list of routers and passwords