No, these plugins (which seem non-existent at this point) are not the Notification plugin.
Steve is referring to some custom plugins. A quick search in the Cordova Plugins registry shows that a few more custom plugins are now available for creating custom alarms.
Check these plugins out:
Note that these are downloaded as .tgz files. To use them with AppBuilder, you need to unpack the archive and package the contents of the package folder in a ZIP file. (The src, www, and plugin.xml fies and folders should be in the root of the archive). Then import
the ZIP as a custom plugin in AppBuilder.