jsGorithm is a Javascript algorithm execution viewer that can be used as an educative tool for introductory courses on programming and algorithmics, with programs written in a subset of C/C++/Javascript. It can be used for teaching and learning.
Diagrammer for .Net Assemblies, also support for Javascript. Good for assembly dependencies. Good for showing the call graph in complex methods. Good for showing the jumps in IL. Good for getting an overview of where the complex parts of a system are.