A free, cloud-based,and ready-to-use online MQTT Broker for IoT developers and testers. Just create your topics and pub/sub on maqiatto.com!
AWS-IOT provides server-side state management for applications where the Particle is asleep most of the time, i.e. battery powered.
In the last month, I have become interested in applications related to smart wear, able to use IoT tools to monitor your body.