jsUML2
A lightweight HTML5/javascript library for UML 2 diagramming.
HTML is the standard markup language used to create web pages, and its elements form the building blocks of all websites.
HTML is the World Wide Web’s core markup language. Originally, HTML was primarily designed as a language for semantically describing scientific documents. Its general design, however, has enabled it to be adapted, over the subsequent years, to describe a number of other types of documents and even applications.