I've been using Scapple a lot more lately. Mainly it's been really useful for stand-up and for public speaking/presentations. I get a rough outline of the the talk, make subpoints, and explore possible tangents.
There's a lot more to be explored with the tool.
@ctricot I can't see what else could be added, it suits all my needs. iOS app would be nice though but it's hard to get profitable there nowadays so I doubt it will be ever released.
TracGen