I'm searching for an app to use more or less like a personal wiki, and to be as much cross-platform as possible.
On my office desktop (Windows) I use a simple, but for me very efficient app called Zim Desktop, that you can see at zim-wiki.org
I use it because it's very simple, I can attach documents, make links, it shows info in a hierarchical form, and it's portable.
I looked for some iPad apps like Evernote, Springpad, OmniOutliner, and more... but they always lack something.
Can any advice me an app with this features ?