[UM-LINUX] Drawing Tools

[Nick Cummings]

I need to make a few drawings for a paper I'm working on.  The drawings 
I'm talking about will just be lines, arrows, and numbers, essentially. 
Can anyone suggest some good Linux software for this task?

My criteria for goodness are basically that it be free (as in beer), easy 
to learn to use (at least at a basic level) and featureful/stable enough 
to be used for my modest purposes.

I've used Adobe Illustrator for these purposes once or twice before, but 
it seems like overkill, and I can't use it at home on my Linux machine.  I 
looked around and saw some promising sounding candidates, like Sketch and 
Inkscape.  And maybe you can do everything I want with the Gimp easily 
enough.  I figured that someone else probably has experience with this.

Thanks,

Nick