Usually when I have been documenting flows and statemachines I have been using MS Visio, unfortunately I no longer hold a license to this very usefull program, so I set out to find a proper freeware program to help me.
The editor in OpenOffice that I use instead of the MS Office programs really isn't comparable to what I'm used to from Visio (or it might be that I just don't know how to use that program), so I ruled that out pretty fast.
Searching the net I ended up on the "Open source as an alternative" page, I didn't know it before, but it seems quite interesting, if you know a comercial program that you would like a free version of, then this page could help you.
Previously I have always gone to tucows to search for free software, but I'll give osalt a go too in the future.
I tried a couble of apps, but never did find one that looked usefull, and was able to export the drawings in .png or another format that is suitabel for including on Web pages :(