TikZ in LaTeX is pretty cool for doing all kinds of diagrams/graphics. From simple block diagrams to fancy stuff[0] There's an excellent long manual widely avai

TikZ in LaTeX is pretty cool for doing all kinds of diagrams/graphics. From simple block diagrams to fancy stuff[0] There's an excellent long manual widely available online as a PDF, and a lot of packages. TikZ is pretty horrible as a programming language (e.g. variables and loops are fiddly and verbose), but you can define your own commands in LaTeX and use those in TikZ, and so make a simple command for any shape (w. label/style) you need repeatedly. [0] see http://www.texample.net/tikz/examples/ http://www.texample.net/tikz/examples/