TextNow - TextNow is a mobile virtual network operator (MVNO) that provides a free phone service to users by using other cellular networks coverage.
Starry - A touchscreen Wi-Fi router and radical Internet service
Dingtone - Dingtone is a free call and texting application for making unlimited calls and text messages to any number at the moment registered in any part of the world by any cellular company.
WiFi Map - A crowdsourced list of routers and passwords
TextMe - TextMe is a free calls and messaging application at both local and international levels.
eero - Blanket your home in fast, reliable WiFi