Learning Japanese Apps, Japan Travel Apps

Use all the technology available to you.
There are plenty of apps out there that can help you learning Japanese and even traveling in Japan. The following are the apps being used by our students.

All the available resources that you can get on the Internet would be a great help!

Tokyo Metro	(Aitas Student's comment) An incredibly useful app I downloaded on my iTouch for Tokyo was the Tokyo Metro. For $1.12, I was able to use it offline and helped direct my route with complete ease. However, getting to and from stations is one thing - you also need to know which exits to follow once you get out of a train, otherwise going the wrong exit at a big station like Shibuya will lead you pretty far from your intended destination.
Real Kana	Real Kana $2.99 The iPhone version of Real Kana for Hiragana and Katakana Practice
iKana touch	(Aitas student's comment) It costs $3.99, but for the price, offers a lot of useful features. It provides a flash-card feature that can quiz you on hiragana, katakana, and other character sets. You can build custom flash card sets (where you select specific characters to add for testing.) It also keeps track of your incorrect answers, so you can practice just those ones. It even provides a writing feature that teaches you how to write the characters. It's a good way to practice the character sets while taking the GO or TTC.
Kotoba	Kotoba is a full Japanese dictionary for free!
StickyStudy	StickyStudy: Kanji Lite (Free) Learning Japanese? Taking the N5 exam? This is the only flashcard app you'll need - and it's free! StickyStudy: Kanji $7.99 Japanese kanji and vocabulary study for JLPT. Stroke animations, example sentences/compounds and full editing.
Midori	Japanese Dictionary $9.99 Midori has a native Japanese handwriting recognition that can recognize kanji and hiragana. It is the most convenient way to find kanjis that you have never seen.
Anki	(Aitas student's comment) One good software is Anki. With it, you can access pre-existing decks, like minna no nihongo, or create your own decks.

Do you have something else you’re using that’s not on the list above?
Let us know and drop some comments about why you like the app!