InterWiki links are a quick way to refer to information in other wikis, without having to remember long or cryptic URLs. To create an InterWiki link, just use the InterWiki name of the foreign wiki, then a colon (:), followed by the name of the page on that wiki.

For example WikiPedia:MoinMoin would be rendered as MoinMoin, which points to the page about MoinMoin on the English Wikipedia site.

You can add new entries by editing ?InterWikiMap.

Of course, InterWiki links are not rendered differently when the remote page does not exist, and MoinMoin cannot check whether you followed the rules for WikiNames of the other wiki. So double-check what you type.

See the MeatBall:InterWiki page on MeatBall:MeatballWiki for further details.

List of valid InterWiki names this wiki knows of (the master copy of this list is at InterWikiMap):

ApacheWiki
https://wiki.apache.org/
ArchLinux
https://wiki.archlinux.org/index.php/
ArchLinuxWiki
https://wiki.archlinux.org/index.php/
CAcert
https://wiki.cacert.org/
CAcertWiki
https://wiki.cacert.org/
CPAN
http://search.cpan.org/search?query=
DeWikiPedia
https://de.wikipedia.org/wiki/
Debian
https://wiki.debian.org/
DebianAdmin:
https://www.debian-administration.org/article/
DebianBug
https://bugs.debian.org/
DebianPackage
https://packages.debian.org/
DebianWiki
https://wiki.debian.org/
EmacsWiki
http://www.emacswiki.org/
FFIIWiki
https://ffii.org/
FSFE
https://wiki.fsfe.org/
FSFEWiki
https://wiki.fsfe.org/
Foldoc
http://www.foldoc.org/foldoc/foldoc.cgi?
Foswiki
http://foswiki.org/
FreeBSD
https://wiki.freebsd.org/
FreeBSDWiki
https://wiki.freebsd.org/
Google
https://www.google.com/search?q=
ISBN
https://isbndb.com/search-all.html?kw=
Ixquick
https://ixquick.com/do/search?cat=web&query=
LibreOfficeWiki
http://www.ooowiki.de/
LinuxWiki
http://www.linuxwiki.de/
MoinDoc
http://hg.moinmo.in/moin/1.9/
MoinMaster
https://master.moinmo.in/
MoinSrc
http://hg.moinmo.in/moin/1.9?f=-1;file=
OpenOfficeWiki
http://www.ooowiki.de/
ParaWiki
http://www.parawiki.org/index.php/
PythonForum
http://wiki.python-forum.de/
PythonWiki
https://wiki.python.org/moin/
RFC
https://tools.ietf.org/rfc/rfc$PAGE.txt
RFChtml
https://tools.ietf.org/html/rfc
RFCpdf
https://tools.ietf.org/pdf/rfc
RFCtext
https://tools.ietf.org/rfc/rfc$PAGE.txt
RFCtxt
https://tools.ietf.org/rfc/rfc$PAGE.txt
RavenWiki
https://wiki.kairaven.de/
Self
/
SquidWiki
http://wiki.squid-cache.org/
TWiki
http://twiki.org/cgi-bin/view/
Ubuntu
https://wiki.ubuntu.com/
UbuntuHelp
https://help.ubuntu.com/community/
UbuntuUsers
http://wiki.ubuntuusers.de/
UbuntuWiki
https://wiki.ubuntu.com/
WikiPedia
https://de.wikipedia.org/wiki/
Wikipedia
https://de.wikipedia.org/wiki/
WikipediaDE
https://de.wikipedia.org/wiki/
WikipediaEN
https://en.wikipedia.org/wiki/
WiresharkWiki
http://wiki.wireshark.org/

MoinMoin marks the InterWiki links in a way that works for the MeatBall:ColourBlind and also is MeatBall:LynxFriendly by using a little icon with an ALT attribute. If you hover above the icon in a graphical browser, you'll see to which Wiki it refers. BTW, the reasoning behind the icon used is based on the idea that a Wiki:WikiWikiWeb is created by a team effort of several people.