Free Timing Diagram Drawing tools

Many a times we need to generate/draw timing diagrams for multitude purposes. While browsing web for the same I came across these free/easy-to-use timing diagram drawing utilities.

1. Timing Diagram Font -- Timing diagram can be generated in MS Word using this
2. Timing Analyzer -- A tool for doing the same
3. Timing Diagram from verilog - using the above tool and small snippet of verilog code, one can generate timing waveform from the design itself. One problem I see with it is that the code snippet doesn't use verilog macro for achieving the same. Handy Timer - A simple and handy timing diagram editor
4. Timing Editor - Another free waveform editor
5. Draw Timing - Command line based waveform drawing SW which take a script as its input