Any Free Block Diagram Programs?

[tooki]

FWIW that seems to me the kind of thing draw.io would be perfect for.

[emece67]

.

[JuanGg]

inkscape

+1 for inkscape

It comes in handy for all kinds of block diagrams and illustrations. I use it often, for example for drawing UML diagrams instead of learning a dedicated tool. Gives output in nice vector formats, and allows you to create re-usable groups and use a snapping grid, which makes it really easy to draw schematics.

For more "blocky" block diagrams, I may just use MS Power-Point.

[MegaVolt]

1.  http://dia-installer.de/index.html.en
2.  for timing diagram:    https://wavedrom.com