At first I wasn't sure about MyThoughts for Mac, from Mode de Vie Software - it seemed a bit simple (particulary after using iMindMap). However, I've come to really like it. It's had a couple of updates since I first started using it, and it's simplicity is actually really refreshing (and it turns out being simple doesn't mean it's not feature-rich enough). Of course, it's Mac only. For $49 it's got a pretty good feature set, and as a native Mac OS X application, it performs nicely.

If you use a Mac, and are looking for a MindMapping tool, MyThoughts for Mac is worth checking out... there's a free demo, available here.

Here are some videos of MyThoughts for Mac in action:

The one thing I've been really hoping for is a MyThoughts for iPad app (actually, there is a MyThoughts iPhone/iPad app, but it's not by the folks at Mode de Vie Software, so it's not what I'm looking for). My understanding is that they do have an iPad app in the works - hopefully it'll show up on the app store soon... and provide file syncing between the Mac and iPad versions (perhaps via iCloud?)