Inkscape seems to be a great open source software to draw and create vector graphics.
Now, I would like to learn more how to use it and I would like to ask you to list here good tutorials and articles that helped you in learning Inkscape.
There are some truely amazing tutorials available from http://inkscapetutorials.wordpress.com/.
Here is a list of those that I have noticed, in no particular order:
Official Inkscape Tutorial: Tips and Tricks.
E.g. radial placement with “Tile Clones”.
Tracing a Bitmap.
“… purpose is not to reproduce an exact duplicate of the
original image; nor is it intended to produce a final
product. No autotracer can do that. What is does is give
you a set of curves which you can use as a resource for
Linked from inkscapetutorials.
Official Inkscape Tutorial: Using the Interpolation Extension.
“Interpolate does a linear interpolation between two or
more selected paths. It basically means that it “fills
in the gaps” between the paths and transforms them
according to the number of steps given.”