• http://twiki.org/cgi-bin/view/Codev/TopicMaps
  • http://www.twiki.org/cgi-bin/view/Codev/TouchGraph
  • http://meatballwiki.org/wiki/TouchGraphWikiBrowser
  • https://en.wikipedia.org/wiki/Topic_Maps
  • https://github.com/elishowk/cablegate_semnet
  • https://github.com/heuer/mappa
  • https://en.wikipedia.org/wiki/Topincs
  • http://wandora.org/www/
  • http://www.garshol.priv.no/download/tmlinks.html