A few of them are really very nice, though, each is good, but I really like a couple of them a lot! I have a custom essay review to do and a few of the designs could be used with it as well. Indeed it is nice that you have put together all of them.
But what's unique about Schwartz is that it's template-based. Each source code output target is a template that can be edited to your specific syntactical tastes. And adding new templates to support new target languages is extremely easy.
Working with Schwartz templates is a simple and intuitive process, similar to using template languages for popular web application frameworks like Ruby on Rails, Django, or JavaServer Pages.