I have loved mindmapping since Tony Buzan invented them (afaik), and the first program I found with mindboggling capabilities, was "The brain" software, which linked almost anything in a mindmapping like enviroment. But it was not very good at maintaining the overview. So I ditched it.
But Mind Manager suddenly came with the "export to link" feature, and RobinNZ CAD blog made me realize its potensial.
But it was somewhat cumbersome to use, so I just made a ActiveWord for it.
Just replace <WORD:mm> with your own aw for Mind Manager.
The topic you want to link, have to be selected.