Free diagramming software

Anyone know of any good free diagramming software for flow/structure diagrams and the like?

you mean like visio (but free) ?

Yes. Actually, I just found Draw in OpenOffice seems to be ok. Still looking at other options if anyone knows of any.

a time ago i searched also for free flow-diagram program. But i found a good one included with openoffice (draw). i think draw is only for drawings - but you can use it for flow charts.

I creaded with it a complex (large 110x50 cm) flow chart. it is very good. What i dont like is a limitation in paper size - so that you should use some pages, if one page is not enought...

Try this one. (yEd) I have not used it much, but it looks pretty good.

http://www.yworks.com/en/products_yed_about.htm

Also here is another one. (Diagram Designer)

http://meesoft.logicnet.dk/

Well JUDE is second to none when it comes to UML. If you happen to be working in Java, it'll even work as a CASE tool.

QSEE Superlite:
http://www.qsee-technologies.com/complete.htm

We use it at University, does pretty much everything you could need.

Thanks. Some great suggestions. I am interested in UML, but am a little unsure of how it works and whether there are free tools to convert UML to java?

Thanks again.

Yes. JUDE. It's a CASE tool (Computer Assissted Software Engineering). It will even reverse engineer your Java code back into UML.

I use MS Paint for my diagrams. You've got all the tools you need to do it. You kind of have to drag your items around yourself, and then re-draw lines to each object. But it's still doable.

Those other software options mentioned here would probably be quite a bit more suitable. But if all else fails, you still have MS Paint.

www.gliffy.com is quite cool, if i didn't have visio i would probably use that.

Cheers
Charlie

I've used OpenOffice Draw a few times for that, and it is quite handy :)
Although it has a few quirks such as it being oddly fiddly to change the appearance of lines that have been placed / will be placed, and doesn't really have a particular direction. The different shapes for flowchart bubbles are rather strange and don't really fit text very well, and typing text onto things never seems to look right. (Tends to need some extra formatting instead of being an instant affair -- especially if you try to add a label to a line!).
On the good end of things, it's really nice how it is consistent with the rest of OpenOffice, (thus has spell check), and has a easy way to set page sizes, add new pages, export as PDF, etc. (All regular word processor features, though not all that common in a flowchart program).

yEd and Gliffy look excellent!
I think I'll download yEd right now. Kind of a shame that it's done using Java and what looks like a non-native UI, but I may let it slip this time. (*Old person grumble*)

What would be incredibly cool, though, would be a plugin for the Zim desktop wiki (or Tomboy) that creates a mind map type thing out of the different sections...
I was expecting such a thing to exist, given Zim's logo, but that doesn't seem the case :(