I’ve just had an article published at PreachingToday.com about how I use mind mapping for sermon preparation.
I mention in the article that the specific app I use is MindNode, which you can find here (iOS) and here (OS X) if you like.
Here’s the article:
How Mind Mapping Has Rejuvenated My Sermon Preparation
Mind maps are a great way to plan anything, it can be used as a brainstorming tool as well. Some good mindmap examples would be in Creately diagram community. You can take those examples to prepare your sermon as well.
Thanks!