Sir Trevor is rich content editing entirely re-imagined for the web: an intuitive editor for web content which does not presuppose anything about how it will be rendered.
Sir trevor content is made up of blocks. By default Sir Trevor ships with the following block types, but you can easily add your own
There are more blocks available in the dedicated blocks repository or it's incredibly easy to write your own.
For more information on Sir Trevor JS check out the repository at github.com/madebymany/sir-trevor-js