Pwyky is a WikiClone implemented in Python, released under a GPL 2 license, and in a single easy-to-install file. Homepage: http://infomesh.net/pwyky/

WikiEngine boasts its UTF-8/unicode handling capabilities, hence its description here. -- SeanPalmer

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From a scan of the site, some of the technology implemented:

• Unicode support
• RecentChanges, WantedPages, OrphanedPages
• Instant PageDeletion
• "Statistics links on all pages" (seems to be just a word count and BackLink list)