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.

SlickEdit (formerly called Visual SlickEdit) is a very powerful and classic cross-platform code editor, text editor, and IDE (Integrated Development Environment) started by Clark Maurer in 1988. When it comes to code reading, it can rival the famous Source Insight, especially on the Linux platform.