SquareSpace - Squarespace is the easiest way for anyone to create an exceptional website. Pages, galleries, blogs, e-commerce, domains, hosting, analytics, 24/7 support - all included.
Bludit - Bludit is a web application to build your own website or blog in seconds, it's completely free and open source. Markdown support.
HubSpot - Grow Better With HubSpot: Software that's powerful, not overpowering. Seamlessly connect your data, teams, and customers on one CRM platform that grows with your business.
Grav - The modern open source flat-file CMS
Duda - Build and sell websites faster with Duda's website builder. Start now to access personalization tools and other website builder features.
WonderCMS - WonderCMS is the smallest flat file CMS. Completely free, open source, privacy oriented for over 12 years.