Are there any free online sentence diagrammers that don't use Microsoft silverlight?
You can use SenDraw diagrammer. It exists in two classes namely LIN4680 Modern English Grammar and LIN5675 Grammar and Usage. You can also use Reed-Kellogg sentence diagrammer online. Check out http://en.wikipedia.org/wiki/Sentence_diagram and www.sendraw.ucf.edu for more information.