Word and Excel to wiki

• WordToWiki - Wikipedia

• Libreoffice wikipublisher exports document to wiki format

• Commons:Convert tables and charts to wiki code or image files - Wikimedia Commons

• Extension:Helios for Word - MediaWiki Is not a Mediawiki extension but a commercial plug-in for MS-Word]

• Helios for Word | easySol Microsoft Office AddIns

• mediawiki extension:SimpleTable

...allows a CSV export from Excel to be pasted in without having to manually edit it into Wiki table syntax. 
It's really crude, and doesn't allow any kind of clever formatting