Software to help design adventures

I'm still looking for the perfect software to help me write D&D adventures, from brainstorming ideas to creating all the encounters in detail. I can't say I have found it yet. One thing I like is Evernote, not because it has the best structure, but because it stores my notes in the cloud, where they can be accessed via a PC client, via a browser, or via my iPad. Masterplan on the other hand is better designed for a story flowchart with encounters, but only works on one fixed PC unless you u

World of Warkraft...