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iThoughts (mindmap)

Paid

iThoughts is a mindmapping tool for the iPad, iPhone and iPod touch (Mac and Windows version also available.).

iThoughtsX

Paid

Mind mapping app, fully compatible with companion apps for iPad and iPhone.

iThoughts2go (mindmap)

Free

With iThoughts2go you can take your mindmaps with you - for reference 'on the go'.