TimingTool

http://www.timingtool.com/menu/feedback/products.php

TimingTool is designed to give electronics engineers an easy to use graphical interface for entering and editing timing diagrams commonly seen in digital electronic design. TimingTool is intuitive in use and always presents the most useful properties of selected objects for easy access.

Diagrams for analysis, design and documentation may be created quickly and efficiently, benefiting workflow saving time and money. * Diagrams for Documentation Diagrams may be exported in a variety of formats for documentation. Al http://www.timingtool.com/menu/feedback/products.php