Understand is a very powerful and professional static code viewing and analyzing tool, designed to help software developers comprehend, maintain, and document their source code. It enables code comprehension by providing flow charts of relationships and building a dictionary of variables and procedures from a provided source code.

Source Insight is a very powerful and popular programming editor, code browser and analyzer. It comes with many advantages, such as rich programming languages support, convenient functions, fast source navigation, real-time context display, independent symbol database, etc., and is widely welcomed by programmers all over the world. It's definitely one of the best programs of its kind.