Scanbot - Scanbot is a mobile app that allows you to use your device's camera as a document scanner. The app is capable of scanning a large number of source materials, and it can handle QR codes as well.

Xmind - Xmind is a brainstorming and mind mapping application.

Scanner Pro - Scanner Pro turns your iPhone into portable scanner in your pocket.

MindMeister - Create, share and collaboratively work on mind maps with MindMeister, the leading online mind mapping software. Includes apps for iPhone, iPad and Android.

Genius Scan - On The Go.

Coggle - Coggle is a simple, beautiful, powerful way of structuring information.