Dartium 1.24.2.0 for Mac was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. Dartium for Mac lies within Developer Tools, more precisely IDE. 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. This free Mac application was originally developed by The Dart Project Authors.
From the developer:
Dartium is a special build of Chromium that includes the Dart VM. Using Dartium means you don’t have to compile your code to JavaScript until you’re ready to test on other browsers. To launch Dartium, navigate to its directory in your finder, and double-click the Chromium executable file.
You may want to check out more software for Mac, such as Objective Basic, Pleinpot or Epsilon, which might be related to Dartium.