ListVirtualWikisSnippet

#set($currentwiki = $context.database)
## Switch to main wiki
$context.setDatabase($context.mainWikiName)
## Get all wiki descriptors documents
#set($wikidescriptorlist = $xwiki.searchDocuments(", BaseObject as obj, StringProperty as prop where doc.fullName=obj.name and obj.className='XWiki.XWikiServerClass' and prop.id.id=obj.id and prop.id.name='server'"))
## Re-switch to current wiki
$context.setDatabase($currentwiki)

## Get all wiki names from descriptors documents names
#set($wikinamelist = [])
#set($DESC_PREFIX = "XWiki.XWikiServer")
#set($DESC_PREFIX_SIZE = $DESC_PREFIX.length())
#foreach($wiki in $wikidescriptorlist)
  #set($ok = $wikinamelist.add($wiki.substring($DESC_PREFIX_SIZE).toLowerCase()))
#end

## Add main wiki if there is no descriptor for it
#if(!$wikinamelist.contains($context.mainWikiName))
  #set($ok = $wikinamelist.add($context.mainWikiName))
#end

This wiki farm contains wikis :
#foreach($wikiname in $wikinamelist)
  * $wikiname
#end