ProductFeed is described as 'product changelog and notification system to announce updates, new features, and important news. Add the embeddable notification feed to your website or product to get started'. There are three alternatives to ProductFeed, not only websites but also apps for Linux, Mac and Chromecast. The best alternative is Gnomecast, which is both free and Open Source. Other great sites and apps similar to ProductFeed are Beamer (Paid) and Mkchromecast (Free, Open Source).