I started to read wiki in 2006, and since then I realized this is a really nice place to learn and share.
Oh, I also like the latex support Failed to parse (SVG (MathML can be enabled via browser plugin): Invalid response ("Math extension cannot connect to Restbase.") from server "http://localhost:6011/en.wikipedia.org/v1/":): {\displaystyle \Delta S=\delta\int\mathscr{L}dt}
from Mediawiki.