Hmm. I can think of two other big names that would fit. Funny that Sun, who no longer exists as an entity gets the brunt.
Apple. The Webkit saga was pure ugliness. The thing finally turned around somewhat, but after years, and essentially killing the original project, khtml.
Google. Tesseract and ocropus. Not google directly, but projects by googlites. I suspect that both are a result of not enough resources by the project maintainer, but both had very interesting technical challenges and had some potential of growth. But. 10 rules rule.