Jibbigo Chinese English Speech Translator (made for iPhone 3GS, 3rd gen. iPod touch or newer)
speak a language you want translated (I use the Mandarin Chinese version), and it converts to text and speaks it back in the desired language, back and forth, so two people can carry on a live conversation. Great for traveling, like a real-time speaking translator. $25 but well worth it for Chinese as it shows pinyin with tones as well as characters. http://www.jibbigo.com/website/index.php
Download
iThoughtsHD (mindmapping)
great visual mind-mapping tool $10 http://itunes.apple.com/us/app/ithoughtshd-mindmapping/id369020033?mt=8
Download
Jot! Whiteboard
another mind-mapping/ drawing tool that takes text as well as free-hand notes and sketches – free or $5 http://itunes.apple.com/us/app/jot/id376133340?mt=8
ArtStudio – Draw and Paint
advanced drawing program, also useful for sketching out apps visually. With more talent than I have, can be used to create extremely detailed art that looks like watercolor, oil painting, etc. http://itunes.apple.com/us/app/artstudio-for-ipad-draw-paint/id364017607?mt=8
WritePad | Sync Notes with Watch and Cloud
handwritten notes to text, can also input via keyboard $4 http://itunes.apple.com/us/app/writepad/id293033512?mt=8
