SparkFun Particle weather shield + Particle Photon + Weather Underground
Monitors the Open/Close status of multiple garage doors alerting via SMS/Text if any left open too long
Parachute velocity is a metric that hasn't been properly measured in the skydiving community. The Parachute Speedometer does just that.
A project that uses the Particle Photon to make it possible to open the door by just pressing a button on your computer keyboard.
Simple motion detection that logs movement into a Google Sheet. Requirements: Photon, PIR Motion Sensor, IFTTT, and Google Sheets,
A reminder with lights and notification. If it's a specific time during the day, it will light up different colors with a notification.