A new, free, GUI-based, digital timing diagram drawing software for Windows 7 or newer (and Linux via Wine
Intended primarily for documentation purposes, electronic hardware designers can use Waveme to draw a timing diagram,
and then export it to an image file (PNG, BMP or TIFF) or a PDF document.
Waveme can be used to draw waveforms (signals and buses), gaps, arrows and labels (see attached images).
Highly customizable, with a wealth of keyboard shortcuts.
Google group for questions, bug reports, feature requests, and general discussion:https://groups.google.com/forum/#!forum/waveme
Waveme is distributed as a 32-bit single-file executable, it doesn't require installation,
and there are no changes to the registry nor configuration files.
Please note that because it is an executable file, it might be flagged by antivirus programs.
Avoid false-positive, by always confirming with Google's www.virustotal.com
Hope you find it useful!