The new entrants to mind-mapping.org this week are:
Taonotes – a reasonably-priced outliner.
Dia – free diagramming software with the ability to draw mind maps, but it has no features specifically aimed at easing mind map production. Then again, it is free.
XWiki MindMap – an add-on to XWiki that lets you introduce mind maps (made in FreeMind) to a wiki.