CalPrint - CalPrint uses your existing reminders and calendar entries on your iPad or iPhone (Exchange, iCal and Google Calendars etc.
Xmind - Xmind is a brainstorming and mind mapping application.
Printer Pro - Print attachments, receipts, documents, web pages from your iPad and iPhone.
MindMeister - Create, share and collaboratively work on mind maps with MindMeister, the leading online mind mapping software. Includes apps for iPhone, iPad and Android.
Air Sharing - Air Sharing lets you bring your documents with you — without bringing your computer.
Coggle - Coggle is a simple, beautiful, powerful way of structuring information.