A mindmapping/brainstorming app that takes advantage of the iPhone's touchscreen and has compatibility with Novamind and Freemind and also exports and imports via the OPML format.
United Kingdom
IOctopus Alternatives
IOctopus is described as 'Online mind map service for a dive deep into a mind for the best ideas' and is a Mind Mapping tool in the office & productivity category. There are more than 50 alternatives to IOctopus for a variety of platforms, including Web-based, Mac, Windows, iPhone and iPad apps. The best IOctopus alternative is AFFiNE, which is both free and Open Source. Other great apps like IOctopus are Xmind, Miro, Freeplane and FreeMind.