Listening to the latest MPU podcast, I was surprised by a comment that it’s not possible to make free form context maps in apps like iThoughts. While I think Scapple is cool (which was specifically mentioned in MPU as a free form tool), you can create multiple free-form nodes in iThoughts too.
Just tap on the blank canvas and choose “New Floating” from the popover. You can even create annotation arrows between nodes for extra craziness.
This also works by right-clicking in iThoughtsX