i) Door/window intrusion detectors called TAG
ii) Video surveillance camera
iii) App for control and monitoring for iOS and Android
As noted in a previous blog post about IFTTT, any IP/WiFi home security camera that has motion detection and email alerts (which pretty much all do) can be used as a trigger using the IFTTT Gmail channel, enabling a given camera to trigger actions by connecting the Gmail channel to any other IFTTT channel by creating or using an existing Recipe.
IFTTT is becoming an increasingly valuable service for smart home and Internet of Things users.