WiFi Map - A crowdsourced list of routers and passwords
Huntathon - Browse and submit Product Hunt Global Hackathon projects
Café Wifi Search 🔍 - Find great cafés to work from, worldwide.
Confs.tech - Open source list of tech conferences: JS / Ruby / Data etc.
Instabridge - Crowdsourced free wifi (now on Android)
MVP-Challenge - 2 weeks. 1 MVP startup. $0 costs