When answering a question here on Ask Ubuntu I sometimes would like to link to a wiki page explaining some topic in more detail, say, the ALSA sound system.
For German speaking users there's the very useful wiki.ubuntuusers.de, but what about an English equivalent? wiki.ubuntu.com comes to mind, but it doesn't even have a page for ALSA, or .profile, or Dolphin, or KDE – you can't be serious!
When looking for information just for myself, I often end up using the excellent Arch Linux wiki, but of course it's weird to link to the Arch Linux wiki to explain Ubuntu stuff.
What did I miss?