Update Scanner is a Firefox addon that monitors web pages for updates, intended for websites that do not provide Atom or RSS feeds. Users can add pages, choose how often changes are checked, and opt to ignore minor updates. Detected changes appear in a notification panel and highlighted in yellow, and updated items are listed in a sidebar.
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sneakypete81.github.io
adobe.com
Adobe Scanner is a mobile app resource for Android or iOS listings, app pages, updates, or community links.
twitter.com
Social account sharing live radio, scanner, or incident-related updates and public monitoring links.
rfsearch.com
RF Search is a search engine for amateur radio, GMRS and business radio. It offers repeater search by state or zip code, with amateur and GMRS repeaters updated daily. A paid membership provides expanded maps without advertisements and local repeater listings.