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 InterWiki page on MeatballWiki for further details.

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

AbbeNormal
http://ourpla.net/cgi/pikie?
Acronym
http://www.acronymfinder.com/af-query.asp?String=exact&Acronym=
Advogato
http://www.advogato.org/
AltLinux
http://altlinux.org/
AltLinuxEn
http://en.altlinux.org/
AtomWiki
http://intertwingly.net/wiki/pie/
BaseRev
https://svnweb.freebsd.org/changeset/base/
BcWireless
http://www.bcwireless.net/moin.cgi/
BitTorrentFAQ
http://www.bamber.org/wiki/ow.asp?
BookShelved
http://bookshelved.org/cgi-bin/wiki.pl?
C2find
http://c2.com/cgi/wiki?FindPage&value=
CAKE
http://www.cakem.net/mywiki/
CPAN
http://search.cpan.org/perldoc?
Cache
http://www.google.com/search?q=cache:
CarpeWiki
http://carpe.com/wiki/wiki.pl?
CoLinux
http://colinux.wikia.com/wiki/
CommunityWiki
http://www.communitywiki.org/
CreationMatters
http://www.ourpla.net/cgi-bin/wiki.pl?
CsWikiPedia
http://cs.wikipedia.org/wiki/
DeWikiPedia
http://de.wikipedia.org/wiki/
Debian
http://wiki.debian.org/
DebianBug
http://bugs.debian.org/
DebianPackage
http://packages.debian.org/
DebianforumDeWiki
http://wiki.debianforum.de/
Dictionary
http://www.dict.org/bin/Dict?Database=*&Form=Dict1&Strategy=*&Query=
Disinfopedia
http://www.disinfopedia.org/wiki.phtml?title=
DocBook
http://wiki.docbook.org/
DocCommit
https://cgit.freebsd.org/doc/commit/?id=
DocRev
https://svnweb.freebsd.org/changeset/doc/
DseWiki
http://www.wikiservice.at/dse/wiki.cgi?
ESW
http://esw.w3.org/topic/
EmacsWiki
http://www.emacswiki.org/
Foldoc
http://www.foldoc.org/foldoc/foldoc.cgi?
FoxWiki
http://fox.wikis.com/wc.dll?Wiki~
FrWikiPedia
http://fr.wikipedia.org/wiki/
FractalWiki
http://www.wikiservice.at/fractal/wikidev.cgi?
FreshMeat
http://freshmeat.net/
FreshPorts
https://www.freshports.org/
GentooLinux
http://gentoo-wiki.com/
Google
http://www.google.com/search?q=
GoogleGroups
http://groups.google.com/groups?q=
HammondWiki
http://www.dairiki.org/HammondWiki/
IAWiki
http://www.IAwiki.net/
IMDB
http://www.imdb.com/title/tt$PAGE/
ISBN
http://isbndb.com/search-all.html?kw=
Issue
https://bugs.freebsd.org/
JargonFile
http://www.google.com/search?btnI=Im+Feeling+Lucky&q=$PAGE+site:http://catb.org/jargon/html/
JspWiki
http://www.ecyrd.com/JSPWiki/Wiki.jsp?page=
JuraWiki
http://jurawiki.de/
KernelNewbies
http://wiki.kernelnewbies.org/
LiberaIRC:
ircs://irc.libera.chat:6697/
LinuxMM
http://linux-mm.org/
LinuxNet
http://linux-net.osdl.org/index.php/
LinuxWiki
http://linuxwiki.org/
List
https://lists.freebsd.org/mailman/listinfo/
ListArchive
https://lists.freebsd.org/pipermail/
LiveJournal
http://www.livejournal.com/users/$PAGE/
LyricWiki
http://lyricwiki.org/
MBWiki
http://wiki.musicbrainz.org/
ManPage
https://www.freebsd.org/cgi/man.cgi?
ManualPage
https://man.freebsd.org/
ManualPageWithTitle
https://man.freebsd.org/$1
MeatBall
http://www.usemod.com/cgi-bin/mb.pl?
MetaWiki
http://sunir.org/apps/meta.pl?
MetaWikiPedia
http://meta.wikipedia.org/wiki/
MoinCVS
http://hg.moinmo.in/moin/1.9?f=-1;file=
MoinDoc
http://hg.moinmo.in/moin/1.9/
MoinMaster
http://master.moinmo.in/
MoinMoin
http://moinmo.in/
MoinSrc
http://hg.moinmo.in/moin/1.9?f=-1;file=
MsgID
http://groups.google.com/groups?as_umsgid=
NemWiki
http://nematologists.org.au/nemwiki
OSPedia
http://ospedia.osdir.com/
OddMuse
http://www.oddmuse.org/
OpenOfficeWiki
http://www.ooowiki.de/
OpenWiki
http://openwiki.com/ow.asp?
Parawiki
http://www.parawiki.org/index.php/
PersonalTelco
http://www.personaltelco.net/index.cgi/
PortCommit
https://cgit.freebsd.org/ports/commit/?id=
PortsRev
https://svnweb.freebsd.org/changeset/ports/
PostWiki
http://www.postwiki.net/
PythonInfo
http://wiki.python.org/moin/
PythonWiki
http://wiki.python.de/
RFC
https://www.rfc-editor.org/rfc/rfc$PAGE.html
ReformSociety
http://www.reformsociety.com/
ReseauCitoyen
http://reseaucitoyen.be/?
Review
https://reviews.freebsd.org/
RuWikiPedia
http://ru.wikipedia.org/wiki/
SL4Wiki
http://sl4.org/wiki/
SeattleWireless
http://seattlewireless.net/?
Self
/
SenseisLibrary
http://senseis.xmp.net/?
SpackOrg
http://www.spack.org/index.cgi/
Spamikaze
http://spamikaze.org/
SquidWiki
http://wiki.squid-cache.org/
SrcCommit
https://cgit.freebsd.org/src/commit/?id=
StrikiWiki
http://ch.twi.tudelft.nl/~mostert/striki/teststriki.pl?
TWiki
http://twiki.org/cgi-bin/view/
ThoughtStorms
http://www.nooranch.com/synaesmedia/wiki/wiki.cgi?
UPC
http://www.upcdatabase.com/item/
Ubuntu
https://wiki.ubuntu.com/
Unreal
http://wiki.beyondunreal.com/wiki/
UseMod
http://www.usemod.com/cgi-bin/wiki.pl?
WLUG
http://www.wlug.org.nz/
WcsWiki
http://www.myelin.co.nz/wcswiki/w/
WebSeitzWiki
http://webseitz.fluxent.com/wiki/
Wiki
http://c2.com/cgi/wiki?
WikiPedia
https://en.wikipedia.org/wiki/
WikiTravel
http://www.wikitravel.org/article/
WikiWorld
http://WikiWorld.com/wiki/index.php/
WikiZnanie
http://www.wikiznanie.ru/wiki/wiki.phtml?title=
WorldWideWiki
http://www.worldwidewiki.net/wiki/
WriteHere
http://www.writehere.net/moin.cgi/
ZWiki
http://www.zwiki.org/
h2g2
http://h2g2.com/dna/h2g2/
hg
http://mercurial.selenic.com/wiki/
py2exe
http://www.py2exe.org/index.cgi/

MoinMoin marks the InterWiki links in a way that works for the ColourBlind and also is 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 WikiWikiWeb is created by a team effort of several people.