FlatSiteBuilder is described as 'The FlatSiteBuilder is a very easy to use content management system and content creation tool running as a desktop application on Linux. You are able to build web content which you can host on github pages for free or any other web space provider' and is a CMS Tool in the Business & Commerce category. There are more than 100 alternatives to FlatSiteBuilder for a variety of platforms, including Self-Hosted solutions, Online / Web-based, Windows, Linux and Mac. The best alternative is WordPress, which is both free and Open Source. Other great apps like FlatSiteBuilder are Drupal (Freemium, Open Source), Grav (Free, Open Source), Jekyll (Free, Open Source) and Joomla (Free, Open Source).
glFusion is an extremely powerful system for creating online content. It powers all types of sites from personal blogs to high volume community discussion sites, intranets, and almost everything in between. It is well suited for both public and private sites.