The popular open-source gardening system called MudPi allows users to remotely schedule watering. It can also monitor and maintain soil moisture, weather, and light intensity.
Using a Raspberry Pi as a network hub for security cameras has become a popular home surveillance method. The project uses the free motionEyeOS software.
MotionEyeOS allows you to set up a motion-triggered security camera that can take pictures or video, which you can then view on a networked computer or upload to the cloud.
HeaterMeter allows you to monitor and control BBQ smokers and grills on the Raspberry Pi or through web-based automation using an algorithm to adjust your cooker.