Apture: bring interactive media to your blog.
Uses: Apture brings popout media via Wikipedia and other sources.
Zemanta: suggests links, articles, and pictures for blog posts.
Uses: Zemanta gave me the picture on the right, the link to Wikipedia article on mind maps and suggested the tags for this post. There is an add-on for Firefox and IE and it works with most blogging sites.
InfoRapid KnowledgeMap: software to analyze text manually or automatically to create knowledge maps. Also can be used to draw your own mind maps.
Uses: I had it analyze and create maps from some of the texts that I use in my classes. This is what it created (and I tweaked a little) from the glossary for one of my class texts.
Text2MindMap: online site to create mind maps from text lists.
Uses: Students could make lists of what they know about a topic and turn it into a mind map.