From Wikipedia (retrieved May 20, 2015):
Weebly offers a free online website creator. It uses a simplistic widget-based site builder that operates in the web browser. All of Weebly’s site elements are drag-and-drop. Weebly works with Microsoft Windows, Mac OS and Linux computers. Weebly automatically generates a mobile version of each website.
From the about page:
Weebly gives millions of people a surprisingly easy and affordable way to create a site that is as unique as they are. With a Weebly site, people can start their own business, communicate with their clients, showcase their achievements, and be an authority on personal and professional interests. Weebly gives everyone the freedom to start a site, blog or online store that works brilliantly across computers, phones and tablets. Offering a range of pricing options including a free plan and premium plans starting at $4/month, Weebly has everything you need to plan, build, publish and grow a site that meets your goals.