Bubble is web development framework and a visual programming tool. It enables non-technical people to build production-ready web and mobile apps without code.
Tilda Publishing is a website builder. It doesn’t matter what — a website, online store, landing page or blog — make it quickly and easily with Tilda.
Cruip is a gallery of free HTML landing pages for your next big project.
Evie is a small and MIT licensed framework with pages out of the box, to build websites faster. It is extemely lightweight, customizable and works perfectly on modern browsers. Created and used in production at unDraw with great loading times! Hope you'll find it useful!