SmartThings
Collects custom SmartApps and Device Handlers in Groovy
...It provides a library of community-developed automation logic and device support code to extend SmartThings beyond its built-in offerings. Users can deploy these scripts in the SmartThings IDE to customize device behavior, logging, capabilities, dashboards, notifications, etc. Device Handlers (drivers) for extended hardware support. Examples of logging, state tracking, threshold alerts.