Graduate student Kirill Shklovsky writes:
I just wanted to make MIT linguists aware that I have a free syntax tree-drawing program available on my webpage. According to Guillaume Thomas it is the best program available for Windows :) It doesn’t reach the sophistication possible with various LaTeX packages, but it is reasonably good with your basic trees and movement arrows. There are various options for formatting the text in your trees and labels the arrows.
And from the program description:
EMFTree is a program for drawing syntactic trees on the Windows OS. The way it works is as follows: you type in the code that will generate your tree, hit Enter, and your tree is drawn. You can then copy the image and paste it into Microsoft Word, Open Office, or any other program.
Since the pictures produced by EMFTree are vector graphics, they should look good both on the screen and on the printed page when scaled to your liking.