I have done extensive research on trying to find free software that I can use to make publication quality structure diagrams and flowcharts with but have yet to find something suitable.
Tools I currently know about are:
And then there are a bunch listed here.
The problem with all of these are that they either make mind-maps that have quirky stiles that don't look very technical/professional or they don't support PDF or PS or high quality bitmap exporting.
I really like XMind, but the free version export totally rubbish quality bitmaps and no PDF.
What I currently use is LibreOffice Draw, but I have to manually place objects and manually connect them with lines and arrows etc. Thus not a very efficient workflow.
What are the tools that you use? Do you have anything that you can recommend?