TikZ

Guides:

TikZ Mini Course: an introductory course to the TikZ package (.tex sources)

Templates:

TikZ Block-schemes Templates: a collection of block-schemes drawn using the TikZ package (please consider visit also this website for other collections) (.tex sources)

Latex code:

Floating TikZ figure declaration

TikZ node style declaration

TikZ path style declaration

How to plot mathematical functions using gnuplot  (how to install gnuplot in Windows)

How to plot data stored in text files