Six arrangements of the same shell. The choice is remembered, and every page in the demo uses it, so pick one and keep reading.
The default. Grouped navigation with icons, and plus-minus disclosure.
Several titled sections, sentence case, chevron disclosure.
A version switcher and a sidebar search, over a flat list with no icons.
The same, with each section able to fold away.
Sections open, and the current page marked with a rule rather than a fill.
Icons only, for a dense application where the labels are learned.