Understand® is an IDE built from the ground up to help you fully comprehend your source code. Analyze it, measure it, visualize it, maintain it - Understand it.
If your code is safety or mission critical or has grown larger than one person can handle, you owe it to yourself to try out Understand. Understand will help you discover exactly what your code is doing and why, and you will soon be wondering how you lived without it. Join the 20,000 other engineers that already Understand their code and try a fully functional trial now, or learn more.
Just installed the tool last night and ran it against legacy C code for a MicroChip PIC 18. Wow! Functionality in the code that I have trying to understand for 3 weeks is beautifully exposed in the control flow diagrams.