Xmind - Xmind is a brainstorming and mind mapping application.
Filza File Manager - Explore files and folders with list view or grid view. View / edit files with powerful viewers.
MindMeister - Create, share and collaboratively work on mind maps with MindMeister, the leading online mind mapping software. Includes apps for iPhone, iPad and Android.
Documents by Readdle - A central hub for all your files.
FeatureMap - FeatureMap story mapping, simple and effective realtime collaboration and collective intelligence tool.
FileApp - FileApp is an iPhone and iPad File System and Document Viewer.