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This is yet another Common Lisp documentation builder.
It renders beautiful one-page docs. Sadly, Litterae itself has no documentation. I've used it to document Teddy and also created a template project for you:
Why Litterae can be interesting for you:
However, there are many problems with Litterae. It seems not mature enough to use in my projects. To name a single feature I miss is cross-referencing. That is the main reason, why I'll not use it for my libraries.