I don't have programming skills, so I try to let the programmers of canonical do this.
Flowcharting is a good way of explanation using graphical and text methods. Unfortunately there isn't a really good programyet.

I would highly appreciate if you would vote for the idea to improve Kivio, or make a new program from scratch here:

http://brainstorm.ubuntu.com/?keywords=flowchart&tags=

Many thanks,
Thomas

Dia works perfectly fine for me, so I don't know what you are talking about

take a look at yed. It's java and produces much better quality charts than dia or kivio. It also has layouting algorithms which work very well.

Well, I tried both programs. And I can say this: Dia has some nice futures, but in my opinion, isn't easy enough (the fact that edges are actually arrows in the help section is complicating). Furthermore: text is always a new box I have to draw. Imagine a large flowchart with a lot of yes/no questions. That's downright irritating(definitely if you know that there are M$programs that let you type a word, and then you just need to click the arrows that you want to have that word on.)
Then yEd was something I really liked, really intuitive, easy to use. But it is a simpler version of the paid version and I couldn't get it to work by downloading it(I could only open it in browser). Also it's not open source.

Thank you for pointing me towards these programs. But unfortunately I'm looking for something on my pc, that's easy to use.

First non-sequitur: I don't know what you think Cannonical are doing for you, but it isn't writing all of your applications.

Here, you are really starting to take the risk of annoying people. Rather than asking people whether they have a better option for flowcharting (and you might say something about what makes your application of flowcharting need different features from the mainstream), you tell them that their option is no good.

So, after that start, why should people take this seriously?

Come on man, where is the love?

Okay I started of wrong. Maybe I should've asked for a good program first. But I did search the package manager and google on flowchart, flowcharts and flowcharting.
I don't know why my start should stop people from taking me seriously.

What I want from a flowcharting program:
intuitive: Like yEd: I draw a box: box. I draw a line: arrow.
Fast: a nice feature would be: I type a word, and every box or arrow I click gets that word. But still having the option to move the text around.
graphically attractive: being able to use colors, backgrounds, different shape. But only optional.
Intelligence: When I move a box around, I want the arrows to move along, and I want the other boxes to move away.

Maybe I ask a lot, but I'm just describing th ideal program.