Alert-Hub.Org maintains Filtered Alert Hub (FAH). Below are various Alert Hubs based on this technology and similar ones. 

• Alert-Hub.Org operates WMO Alert Hub using FAH and aggregating across this list of CAP Feeds published by recognized alerting authorities worldwide. 

• AccuWeather aggregates a subset of the list of CAP Feeds maintained by Alert-Hub.Org.

• ESRI operates CAP Connector, republishing as a GIS Feature Service all CAP alerts aggregated by Alert-Hub.Org. Those CAP alerts can be viewed via Esri here.

• Global Disaster Alerting Coordination System (GDACS) aggregates the list of CAP Feeds maintained by Alert-Hub.Org.

• Google Public Alerts aggregates a subset of the list of CAP Feeds maintained by Alert-Hub.Org.

• IFRC operates IFRC Alert Hub, aggregating these CAP Feeds published by recognized alerting authorities worldwide.

• KDE Project operates the FOSS Public Alert Server, aggregating these CAP Feeds.

• MeteoAlarm publishes a CAP feed for most European national weather services, and most of those CAP Feeds are also in the list maintained by Alert-Hub.Org.

• meteoblue aggregates the list of CAP Feeds maintained by Alert-Hub.Org.

• The Weather Company (TWC) aggregates a subset of the list of CAP Feeds maintained by Alert-Hub.Org.

• Traveller Information Services Association republishes via TPEG-EAW all CAP alerts aggregated by Alert-Hub.Org.

• Windy.com shows CAP Alerts aggregated by Alert-Hub.Org, except for alerts with "minor" in the CAP severity element. 

• WMO Severe  Weather Information Centre (SWIC) aggregates these CAP Feeds published by WMO Members worldwide.

Note: Common Policies and Practices published by Alert-Hub.Org compares and contrasts CAP usage by seven major services: Google Public Alerts, IFRC Alert Hub, MeteoAlarm, meteoblue, Traveller Information Services Association, WMO Alert Hub, and WMO SWIC. Hong Kong Observatory (a WMO Centre),  offers a CAP Checker tool that flags variance with these policies and practices for CAP alerts published at WMO SWIC by WMO Members.