WorldWideWeb 2.1.1 for Mac could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. This free Mac app is an intellectual property of The Iconfactory, Inc. The software lies within Developer Tools, more precisely Webmaster Tools. Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe.
From the developer:
WorldWideWeb is a handy web development tool. It’s designed for people who need to test things on their Mac before moving the files onto a real web server like Apache or nginx. It also allows you to work in those increasingly rare moments where you don’t have a connection to the Internet.
You may want to check out more software for Mac, such as ModelBaker, PageRank Viewer or Navicat for SQLite, which might be similar to WorldWideWeb.