Zim-Wiki - a desktop wiki

Serge is using Zim Wiki to document some of his development experiences, and it looks quite an useful tool.

Zim is written in Python and has a nice/clean Gui.

Here is the Windows installer:

Another similar tool is http://keepnote.org/

An interesting and powerful idea is to add TeamMentor Import/Export features to these products so that  we (i.e. TM Users) can use these tools as Article creators/editors.