Snow, neatly stacked.
Igloo is a source-control and release companion for ServiceNow scoped apps. For every app it shows which version, branch and commit state lives on each instance (dev, test, prod and so on), whether the latest committed changes have been published to your App Repo, and what is installed where. It only reads: the free version never changes anything on your instances or Git hosts, and it sends nothing to us.
The demo runs on sample data. Reading your own instances (Live mode) needs the installed extension, because a web page cannot call your ServiceNow instances.