Forge

The OutSystems Forge is a repository of reusable, open code modules, connectors, and UI components to help speed up app delivery time.
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result for tag 
"Desktop Notification"
Web Notifications
by 
Henrique Batista
Integration with Google Firebase to take advantage of the Notifications API.

If you think what mobile device feature is missing on web, push notifications is probably it.
Latest version 
1.0.2  (O10)
Latest release
18 May 2017
Desktop Notification
 
Firebase
 
Notifications
 
Web Notifications