I think it could be convenient if we have a topic to gather all the software tools that we are using for research. That way we have a neat reference of the available toolkit.
I’ll start with a few links to the tools that I use during my research (it’s all Open Source so download freely):
http://www.wordpress.org - I’m running a local wordpress on my laptop that I use as notebook. I use a Firefox-plugin (ScribeFire) to be able to quickly dump stuff I find online into my ‘notebook’.
http://www.xmind.net/ - Mind-maps and a host of other diagrams to support brainstorming and other processes.
http://www.yworks.com/en/products_yed_about.html - Great for context-maps, process-charts, etc. Has ‘intelligent’ node re-routing so just dump everything into a diagram and let yEd clean up the mess for you.
http://www.argunet.org/ - A tool for argument-mapping. I’m still figuring out what this can do for me, but maybe someone else can already use it for something.
http://cmap.ihmc.us/ - Very capable tool for concept-mapping. Used it for a short while but now I use yEd for concept-maps.
http://www.thebrain.com/ - TheBrain is not Open Source but they have a freeware version. Very nice tool for mapping out information-spaces (it’s actually a ‘cognitive browser’). Don’t use it myself any more (switched to wordpress for that) but it might be useful to someone here.