It's especially great for the tipa (IPA symbols) and synttree (Syntax trees) packages, as they can get to be pretty finicky. For diagrams, WhizzyTeX and TikZ i

It's especially great for the tipa (IPA symbols) and synttree (Syntax trees) packages, as they can get to be pretty finicky. For diagrams, WhizzyTeX and TikZ is even more amazing! (Although, it doesn't seem to do node text properly. Still, it's the layout of the diagram that's most important.)