Timing Diagram software suggestions?

[PickyBiker]

My little flight controller project has exceeded the complexity that I can keep in my head. I need something to draw timing diagrams that doesn't cost a fortune. I have tried using MS Project, but it's way too tedious for that. I downloaded a couple free trial that were very limited and expensive to purchase.

I need to be able to draw something like this:

clock ---___---___---___---___---___---___---___---___
Signal 1 -------------______----------___----------------
Signal 2 ______------______------______------______----

Etc. etc. etc

Anybody using something that will work for this?

Thanks,

PickyBiker