I would like to have suggestions of good software for drawing illustrations in research papers. I already know about Xfig, but this works only on Linux and is at times, clunky when it comes to text. Moreover the resolution is not always perfect making it difficult to manoeuvre the objects. Besides it is tough to learn and master, with all its weird click procedures.
I would love to know about better alternatives. Not talking about graphs here, just block diagrams and explanatory illustrations.
The vector graphics language
Asymptote is a very nice tool for both 2D and 3D images. From its website:
Asymptote is a powerful descriptive vector graphics language that provides a natural coordinate-based framework for technical drawing. Labels and equations are typeset with LaTeX, for high-quality PostScript output.