Topicmap.com  
   Portal features links to vendors, news, software, examples, and specifications.
   http://www.topicmap.com/

Topicmaps.net  
   An informative web site maintained by Michel Biezunski and Steven R. Newcomb, the historical fathers of the concept.
   http://www.topicmaps.net

XML Cover Pages - Topic Maps  
   Part of Robin Cover Pages on standards survey. References, news, press releases and abundant links.
   http://xml.coverpages.org/topicMaps.html

Topic Map Links  
   Features links to articles on design, visualization, schemas, specifications, and content management. By Lars Marius Garshol, editor of ISO 13250 specification.
   http://www.garshol.priv.no/download/tmlinks.html

The TAO of Topic Maps  
   The reference paper by Steve Pepper, introducing the key concepts. Features a discussion of knowledge structures and information management.
   http://www.ontopia.net/topicmaps/materials/tao.html

Topic Maps Bond University  
   A practical website with tutorials, examples, news, weblogs and links to related resources.
   http://topicmaps.it.bond.edu.au

WebLogs of TM Bond University  
   Breaking news from various sources.
   http://topicmaps.it.bond.edu.au/weblogs.mc

TopicMap Central  
   A community forum for the development of topic map design patterns and Published Subject Indicators.
   http://www.topicmapcentral.com/index.html

Easytopicmaps  
   A wiki for explanation and promotion of the standard.
   http://easytopicmaps.com