Sidengo - Create a beautiful website in minutes.
OpenMCT by NASA - A web based mission control framework
Google Sites - Access Google Sites with a free Google account (for personal use) or G Suite account (for business use).
Themeshaker - It's a web application and filtering tool to find WordPress themes quickly and easily.
UX folio - A portfolio builder for UX designers
SiteSee - Curated gallery of beautiful, modern websites.