CodeWalker is described as 'Developer tool that shows you how your source code fits together, how it's structured, and how it executes. Instantly compare complex structures, find unintentional recursion, and just see how your code actually works, in 2D and 3D modes. It's like GPS for your code' and is an app in the development category. There are seven alternatives to CodeWalker for a variety of platforms, including Windows, Linux, Mac, Web-based and iPad apps. The best CodeWalker alternative is Source Insight. It's not free, so if you're looking for a free alternative, you could try CodeCompass or Source-Navigator NG. Other great apps like CodeWalker are Understand, Cauditor, JArchitect and CodeNavigator.