There are some extensions that allow page or namespace specific selection of skins, such as the http://www.mediawiki.org/wiki/Extension:SkinPerPage

We give some examples for the extensions, for more details, see Mediawiki access/Skins.

[edit] 1 Mediawiki defaults

chick

modern

cologneblue

myskin

nostalgia

simple

standard

[edit] 2 Custom skins

Mediawiki access/Monobmo/Example

Mediawiki access/Monobmo/nocss