Hello developers! I am back for part 3 in our series on plug-in free web development. While the first article was all about theory, the second showed you how to implement bar graphs with HTML5. Today we’ll focus on something even more common. Interactive maps aren’t particularly new; they’ve been around for years. What’s different about the map, we will be developing during the course of the following article is, that it will be plug-in free. No Flash, no Silverlight, no Java, nothing.