Mindmanager from Mindjet is a programme I use all the time.

Although designed as a mind-mapping tool, it is useful at so many other levels. As a visual person, I find that I plan almost everything in Mindmanager from meeting agendas and minutes through to designing leadership structures and outlining sermons. As already noted in a previous post I even use it, in presentation mode, as my notes during preaching.

If I could only have one program in addition to the standard office suite, this would be it.